IOTA IIS Central Inverter User Guide

: June 11, 2024
: IOTA

Table of Contents

IOTA IIS Central Inverter
5YR – Five-Year Extended Warranty
BATINST – Battery Installation by Factory Certified Technician
BTM – Battery Temperature Monitor
WALL – Wall Mount Bracket
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

IOTA IIS Central Inverter

Explore the available options for IIS Central Inverters to design the perfect emergency lighting inverter solution for your unique application.
Note: not all options are available for each model. See Table 1 on page 13 to quickly determine option availability per model, or consult individual specification sheets.

5YR – Five-Year Extended Warranty

Provides additional warranty coverage up to a total of five years on electronic components. See iotaengineering.com for full warranty details. Batteries are covered under a separate pro-rated warranty. Available in the continental U.S. only.
Requires factory startup (see FSREG#) to be ordered.
Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P, and IIS3P EXT models.

BACIP – BACnet IP Interface

Equips the IIS Inverter System with an RJ-45 Ethernet port for remote communications to a Building Management System (BMS) via the BACnet IP protocol. The BACnet IP interface supports standard IP network settings (DHCP or static IP address, subnet mask, default gateway and programmable port number) and has a programmable system-wide Device Instance number. This BACnet IP interface provides read-only access to the following telemetry about the IIS Inverter System:

Input Voltage(s)
Output Voltage(s)
Output Current(s)
Total Output Power
Ambient Temperature
Battery Voltage
Battery Current
Total Time on Battery (in Emergency Mode)
Days of Operation
Results of the Inverter’s last automatic monthly self-test
Results of the inverter’s last automatic yearly self-test
Alarm states include no utility, on battery, battery low, input voltage high/low, inverter failure detected, inverter overloaded and overload shutdown, ‘load reduction’ activated, ambient temperature high, and battery charger fault.

BACNET – BACnet MS/TP Interface

Equips the IIS Inverter System with an RS-485 serial port for remote communications to a Building Management System (BMS) via the BACnet MS/TP protocol. The BACnet interface supports standard baud rates (9600, 19200, 38400, 57600, 115200) and MAC addressing (0-127), and has a programmable system-wide Device Instance number. The BACnet interface supports standard BACnet discovery and provides read-only access to the following telemetry about the IIS Inverter System:

Input Voltage(s)
Output Voltage(s)
Output Current(s)
Total Output Power
Ambient Temperature
Battery Voltage
Battery Current
Total Time on Battery (in Emergency Mode)
Days of Operation
Results of the Inverter’s last automatic monthly self-test
Results of the inverter’s last automatic yearly self-test
Alarm states include no utility, on battery, battery low, input voltage high/low, inverter failure detected, inverter overloaded and overload shutdown, ‘load reduction’ activated, ambient temperature high, and battery charger fault.
Event logs, alarm logs, and test logs as text files downloadable via BACnet file transfer

BATINST – Battery Installation by Factory Certified Technician

Provides expert battery installation done by a certified IIS Inverter Technician. The IIS Technician will come to the job site to conduct final installation of your IIS Inverter System’s batteries and test their operation. The IIS Inverter must already be physically installed in its final operating location before the technician arrives and all conduit/wiring must be extended to the IIS Inverter System. See iotaengineering.com for more details on how to order/schedule battery installation.
Available in the continental U.S. only. Requires factory startup (see FSREG#) to be ordered.
Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P, and IIS3P EXT models.

BFAN – Battery Cabinet Fan

The IIS Inverter battery cabinet(s) are equipped with a fan (one per battery cabinet) for additional airflow and ventilation.
Available on IIS3P and IISCN3P models.

BLOCK(#) – Output Breaker Locks

Provides lock tabs on the output circuit breakers to prevent unauthorized personnel from tampering with the breaker positions. The breaker locks can either be configured to “lock on” (ie: the lock must be removed to open the breaker and remove power to the emergency circuit) or “lock off” (ie: the lock must be removed to close the breaker which is useful to prevent the breakers from accidentally being closed, and thus energizing the circuit, during maintenance).
Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P and IIS3P EXT models.

BTM – Battery Temperature Monitor

Includes a Battery Temperature Monitor with Shunt Trip DC breaker(s) (1 breaker per battery string). The BTM monitors the batteries for over- temperature or thermal runaway conditions and trips the battery string DC breaker if over-temperature/ thermal runaway conditions exist. Includes a Form C Dry Contact to connect to a Fire Alarm Panel for remote alarm signaling. Additionally, an external Exhaust Fan Monitoring System will observe a “state of health” dry contact input that is part of the external exhaust fan. If the exhaust fan is in an alarm condition and the normally-open contact is closed, then a signal is sent to the IIS Emergency Inverter to stop charging the batteries.
Requires factory startup (see FSREG#, FSCAN, FSMEX) to be ordered. This option is required in California when the
IIS Inverter System has more than 50 gallons of electrolytes or more (applies to 16.7VA through 50000VA single and three-phase models). Available on IIS Single Phase, IIS3P, and IISCN3P models.

BYPASS – Internal Maintenance Bypass (Make Before Break)

Includes a Maintenance Bypass Switch that is mounted inside the IIS Inverter System. This device allows maintenance personnel to route power from the AC utility directly to the output circuit breakers, bypassing the inverter electronics. The switch isolates the system to perform routine maintenance or servicing while allowing the lighting load to remain in normal operation. The “make before break” switch shorts the direct electrical connection from the AC utility to the output circuit breakers immediately before power is disconnected inside the inverter. Requires output circuit breakers. If output circuit breakers are not desired, an External Maintenance Bypass may be available (see EXTPASS).
Available on IIS Single Phase and IISC models. This feature is standard with IIS3P and IISCN3P models.

BYPASSBBM – Internal Maintenance Bypass (Break Before Make)
Includes a Maintenance Bypass Switch that is mounted inside the IIS Inverter System. This device allows maintenance personnel to route power from the AC utility directly to the output circuit breakers, bypassing the inverter electronics. The switch isolates the system to perform routine maintenance or servicing while allowing the lighting load to remain in normal operation. The “break before make” switch disconnects the power inside the inverter immediately before it makes the direct electrical connection from the AC utility to the output circuit breakers. Requires output circuit breakers. If output circuit breakers are not desired, an External Maintenance Bypass may be available (see EXTPASS).
Available on IIS Single Phase, IISC, IIS3P, and IISCN3P models.

DR – Dimming Relay

Allows a 0-10V dimming signal to reach interfacing emergency luminaires during normal power conditions and will interrupt the 0-10V dimming signal if a power loss is detected. This will cause the emergency luminaires to operate at full light output in power loss conditions regardless of the position of a 0-10V dimming control. Note: the usefulness of onboard dimming relays is limited in large applications with multiple circuit breakers since this only allows for a single dimming control to be employed for each output circuit. Consider using an ALCR device such as the IOTA ETS DR in these scenarios.
Available on IIS 1100 and IISCN models.

DRIP – NEMA 2 Drip Top

Provides a NEMA 2 drip top shield to protect the electronics and batteries from falling or splashing water. Typically one NEMA 2 Drip Top is required per electronics and battery cabinet. Note: this option is NOT intended for use outdoors and will NOT allow indoor-rated inverters to be suitable for outdoor applications.
Available on IIS 1100, IIS Single Phase, IISC, IISM, IIS3P, IISCN and IISCN3P models.

EMD – Enhanced Metering and Programming Display

Outfits IISCN models with a meter panel and keypad display that enables additional metering and programming functions. This option allows users to view data on system and alarm status as well as the results of automatic life safety tests. The EMD option also allows users to program the date, time, and duration of automatic monthly and annual tests as well as configure set-points for summary alarm contacts.
Available on IISCN models.

EO – Emergency Override
Requires a 120 or 277 VAC feed from the control switch. Provides the ability to enable emergency output for typically unoccupied venues (such as a stadium) only when emergency egress is required. The IIS Inverter is equipped with an Enable On/Off circuit at the feed panel, separate from the inverter supply feed. When the Enable On/Off circuit is OFF, the IIS Inverter will continue to charge the batteries, but will not energize the emergency load. The emergency output may be re-enabled by switching the Enable On/Off circuit to ON. This option is useful in situations (such as stadiums) where the building isn’t always occupied and emergency egress lighting isn’t always required. Note: this option may not be acceptable in certain jurisdictions. Consult local and national codes before ordering.
Available on IIS EXT 1750 models.

EXTPASS – External Maintenance Bypass (Make Before Break)
Equips the Emergency Inverter with a maintenance bypass switch mounted exterior to the unit in a NEMA 1 enclosure with a hinged door measuring 20” high x 16” wide x 9” deep. This device allows maintenance personnel to route power from the AC utility directly to the lighting load, bypassing the inverter electronics. The switch isolates the system to perform routine maintenance or servicing while allowing the lighting load to remain in normal operation. The “make before break” switch shorts the direct electrical connection from the AC utility to the lighting load immediately before power is disconnected inside the inverter. This option cannot be used in conjunction with more than one output circuit breaker and, if a single output circuit breaker is used, it must be sized for the total system current.
Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P, IIS3P EXT, and IISCN3P models.

FASTCHG – Fast Charge, Battery Charger Upgrade
Upgrades the battery charger on the IIS Inverter System to decrease the time it takes to recharge a fully discharged battery bank to full capacity from the standard 24-hour period to a 12-hour period.
Available on IIS 1100, IIS Single Phase, IIS EXT (excluding 1750), IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

FLOOR – Floor Mount Bracket
Provides a bracket for securing the IIS Inverter System to the floor. This option will add anywhere from 2.7” to 5” to the total system height depending on the model (see individual specification sheets for more details).
Available on IIS 1100, IISC, IISM, and IISCN models.

FLRMOUNT – Floor Mount Base

Provides a base that is factory-installed to the bottom of the IIS EXT 1750 for mounting to the floor.
Available on IIS EXT 1750 models.

FLRSTRP – Floor Mount Bracket and Battery Strapping

Includes options “FLOOR” and “STRAP.” Provides a floor mount bracket to secure the IIS Inverter System to the floor and battery strapping to contain the batteries within the system.
Available on IIS 1100 and IISCN models.

FSREG(#), FSCAN, FSMEX – Factory Startup
Factory startup provides the confidence and reliability of expert installation on IIS Inverter Systems. A qualified IIS technician will visit the job site to oversee the startup and initial testing of the IIS Inverter to ensure it performs to factory specifications. Should any problems be detected, the IIS Technician will take corrective action to repair the affected components. See iotaengineering.com for more information about what is included in Factory Startup.

Must be scheduled with the factory at least two weeks out from when the unit has been received at the job site.
The IIS Inverter must already be physically installed in its final operating location before the technician arrives and all conduit/wiring must be extended to the IIS Inverter System. Note: system should not be energized before the IIS Inverter technician arrives. Purchasing IIS Inverter Factory startup provides an additional year of Warranty coverage on all electronic components, provided Factory Startup occurs within 90 days of ship date. Note: the additional warranty provided by Factory Startup does not apply to Canada (FSCAN), Mexico (FSMEX), Hawaii and Alaska (FSREG13), or anywhere outside the continental USA.

FT – Fast Transfer

IIS Single Phase FT (Fast Transfer) models will transfer to battery power (emergency mode) when AC utility power is interrupted for less than 2ms. This allows IIS Single Phase FT models to be compatible with any lighting type including LED, Fluorescent, Incandescent, Quartz and HID lamps in addition to motor loads. IIS Single Phase FT models feature a line interactive design to eliminate excessive transfers to battery power, and are considered “uninterruptable.”
Available on IIS Single Phase models.

IDC – Inverter On, On Utility, On Battery Dry Form C Contact

Provides Dry Form C Contacts that will change state when the IIS Inverter System transfers from AC utility to battery power (emergency mode). These Form C Contacts are rated at 5 amps maximum at 250VAC/30VDC. These contacts can be used to provide a continuity path to an external monitoring device (not provided), such as a Building Management System (BMS) or Indicator Panel for remote monitoring of the IIS Inverter’s operating mode.
Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P, IIS3P EXT, and IISCN3P mod

IRTEST – Infrared Remote Test

Provides a method to manually trigger an Inverter self-test via a laser remote (remote included).
Available on IIS 1100 and IISCN models.

KEYPAD – Keypad and Display Panel (IIS EXT 1750 only)
Includes with the IIS EXT 1750 a 4 x 20 vacuum fluorescent display and a 4-button keypad that allows users to view alarm, test, and operating data about the IIS EXT 1750 and set test and alarm parameters. The KEYPAD option is used for system setup and status and is recommended to order one KEYPAD per site. The KEYPAD option allows users to view the following telemetry about the IIS Inverter System.

Input Voltage
Output Voltage
Output Current
Battery Voltage
Battery Current
Battery Temperature
Ambient (Internal) Temperature
Total Time on Battery (in Emergency Mode)
Days of Operation
VA Output
Battery DC Watts (total battery wattage the inverter is processing)
Results of the Inverter’s last automatic monthly self-test
Results of the inverter’s last automatic yearly self-test
Alarm states include High/Low Battery Charger Fault, Near Low Battery, Low Battery, Load Reduction Fault, Output Overload, High/Low AC Input Volts, High Ambient Temperature, Inverter Fault, and Output Fault.

LBT – Load Bank Test

As part of the Factory Startup and Testing Process, an IIS Inverter technician will perform a full-load test IIS Inverter System to ensure that it is ready for emergency operation. This option is useful in situations where the total emergency lighting load isn’t present at time of Inverter Startup, but a full-load test is desired. Available in the continental U.S. only.
Requires factory startup (see FSREG#) to be ordered.
Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P, and IIS3P EXT models.

LCR – Load Control Relay

Equips the IIS Inverter with a relay used to bypass an ON/OFF control (such as a wall switch or occupancy sensor). Note: the usefulness of the on-board load control relay is limited in large applications with multiple circuit breakers since this only allows for a single ON/OFF control to be employed for each output circuit. Consider using an ALCR device such as the IOTA ETS DR in these scenarios. Requires at least one output circuit breaker.

LFILTER – TVSS Line Filter

Protects the emergency inverter against short-duration, excessive voltage spikes (such as lightning strikes) on the utility line by suppressing the voltage to a safe level and diverting the excess current to the ground. TVSS stands for Transient Voltage Surge Suppressor.

MDC – Status Monitoring Dry Form C Contacts

Equips the IIS Inverter System with a series of Dry Form “C” contacts that are pre-configured to various indicators on Inverter status including:

Utility power present
Inverter bypass (if optional maintenance bypass is included, see BYPASS, BYPASSBBM, and EXTPASS)
High temperature
Summary fault
Inverter on (emergency mode).

These contacts will change state when their associated Inverter state is triggered. For example, if the IIS Inverter System detects a high-temperature fault, the high temperature Status Monitoring Contact will change state. These contacts can be connected to an external panel (see “MDCP” option) or indicator (not provided) for external monitoring of the IIS Inverter’s alarm status.
Available on IIS 1100, IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

MDCP – Status Monitoring Dry Form C Contacts with Remote Status Panel

Includes the MDC option (see MDC section for more details) and an additional remote status panel and alarm silence switch that will display alarms based on the state of the Status Monitoring Dry Form C Contacts.
This allows users to remotely monitor the Inverter status and silence alarms.
Available on IIS Single Phase, IISC, IIS3P, and IISCN3P models.

MODBUSIP – MODBUS TCP Interface
Equips the IIS Inverter System with an RJ-45 Ethernet port for remote communications to a Building Management System (BMS) via the MODBUS TCP protocol. The MODBUS TCP interface supports standard IP network settings (DHCP or static IP address, subnet mask, default gateway, and programmable port number). The MODBUS TCP interface provides read-only access to the following telemetry about the IIS Inverter System:

Input Voltage(s)
Output Voltage(s)
Output Current(s)
Total Output Power
Ambient Temperature
Battery Voltage
Battery Current
Total Time on Battery (in Emergency Mode)
Days of Operation
Results of the Inverter’s last automatic monthly self-test
Results of the inverter’s last automatic yearly self-test
Alarm states include no utility, on battery, battery low, input voltage high/low, inverter failure detected, inverter overloaded and overload shutdown, ‘load reduction’ activated, ambient temperature high, and battery charger fault.
Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

MODBUS RTU – MODBUS Serial (RTU or ASCII) Interface
Equips the IIS Inverter System with an RS-485 serial port for remote communications to a Building Management System (BMS) via the MODBUS RTU or MODBUS ASCII protocol (selectable). The MODBUS Serial interface supports standard baud rates (9600, 19200, 38400, 115200), parity (no parity or even parity) and device addressing (1-247). The MODBUS Serial interface supports setting a custom Device/User ID string (via Function Code 0x15) and retrieving it (via Function Code 0x11 – Report Server ID – or Function Codes 0x2B/0x0E – Encapsulated Interface Transport ‘Read Device Identification’). The MODBUS Serial interface provides read-only access to the following telemetry about the IIS Inverter System (via MODBUS Function Codes 0x01 through 0x04, and 0x14 for retrieving log files):

Input Voltage(s)
Output Voltage(s)
Output Current(s)
Total Output Power
Ambient Temperature
Battery Voltage
Battery Current
Total Time on Battery (in Emergency Mode)
Days of Operation
Results of the Inverter’s last automatic monthly self-test
Results of the inverter’s last automatic yearly self-test
Alarm states include no utility, on battery, battery low, input voltage high/low, inverter failure detected, inverter overloaded and overload shutdown, ‘load reduction’ activated, ambient temperature high, and battery charger fault.
Event logs, Alarm logs and Test logs, as text files downloadable via MODBUS Read File Record function code 0x14.
Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

NOFF – Full Normally-Off Output
This option is desirable when connected emergency equipment should only operate during power loss conditions. During normal operation, while the IIS Inverter System is connected to utility power, the normally-off load circuit will remain inactive. Should a power loss be detected by the IIS Inverter System, the normally-off load circuit will engage and the emergency equipment will be powered via the IIS Inverter’s internal batteries. A 1-pole output circuit breaker is provided for connecting to the normally-off emergency load or to normally-off distribution breakers. Available on IISM models.

OBSHUNT – Main Output Breaker with Shunt Trip
Outfits the IIS Inverter System with a main output circuit breaker that includes a shunt trip that can be used to trip the circuit breaker via an external sensor or remote switch (not provided). A terminal block is provided for connection, and users must supply their own normally-open momentary push button switch or sensor to activate the shunt trip feature. Available on IIS Single Phase, IISC, and IIS3P models.

OTA – Output Breaker Trip Alarm
Equips optional output distribution circuit breakers on the IIS Inverter System with an audible and visual alarm that activates with the circuit breaker is open or has tripped. If the system includes a display panel, the output circuit breaker trip alarms will also cause an alarm-state notification to appear on the display panel when a circuit breaker has tripped. This option is especially useful with normally-off breakers since normally-off breakers don’t provide a visual indication that they have been tripped. Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IISM, IIS3P, IIS3P EXT, and IISCN3P models.

OTDELAY – Output Transfer Delay to Emergency

This option causes the IIS Inverter System to delay the transfer from normal operation (AC utility power) to emergency operation (battery power) and vice versa. When power is lost, the IIS Inverter System will take 3 seconds (factory default) to apply battery-supplied power to the emergency circuit. This is useful in some fixture applications where sensing controls need to detect the loss in utility power to default to full light output in emergency mode. The transfer delay is factory set at 3 seconds but may be field adjusted by an IIS Inverter Technician to 1-8 seconds.
Available on IIS Single Phase, IISC, IIS3P, and IISCN3P models.

PM(A or B)REG(#) – Five-Year Preventative Maintenance Plan

Ensure your IIS Inverter System operates at peak performance through its operating lifespan with regular preventative maintenance performed by a qualified IIS Inverter
Technician. IOTA’s network of factory service technicians and factory-trained and authorized service centers will travel to the job site to perform critical maintenance tasks on your IIS Inverter.
System on an annual (option PMA5REG#) or bi-annual (option PMB5REG#) basis. See iotaengineering.com for more details on what is included in the IIS Central
Inverter preventative maintenance plan. Available in the continental U.S. only. Requires factory startup (see FSREG#) to be ordered.
Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P and IIS3P EXT models.

RAP – Remote Summary Alarm Panel

Provides a box (4″ x 4″ x 2 ¼”) containing a red alarm light and an audible alarm with a silence switch that will activate on any alarm condition. See individual product user manuals for alarm details. The Remote Summary Alarm Panel may be installed up to 1000 feet from the Inverter.
Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IISM, IIS3P, IIS3P EXT, and IISCN3P models.

RMP – Remote Meter Panel

Outfits the IIS Inverter System with an additional detached panel and keypad that provides greater flexibility in monitoring and programming the system from a remote location (up to 150 feet away from the inverter). This option allows users to remotely view the status, alarm, and test data about the IIS Inverter System and remotely program
the system and test parameters. Standard Remote Meter Panel mounting distance is 100 feet but it may be extended up to 150 feet from the IIS Inverter. The
Remote Meter Panel is an addition to the standard display panel attached to the Inverter cabinet.
Available on IIS Single Phase, IISM, IIS3P, and IISCN3P models.

RS232 – RS232 Serial Port
This option equips IISM models with an RS232 Diagnostic Interface designed to remotely monitor system parameters, events, and automatic test data. The user can use the RS232 interface to command the system to perform a life safety test and review all system, event, and test parameters. Access is provided via a DB9 connector and transmits at a 9600 baud rate. Note: an RS232 port may be offered as standard on other models; consult specification sheets. Available on IISM models.

RTS – Remote Test Switch and Indicator
Provides a remote test switch, alarm, and indicator that can be used to remotely trigger a life safety test. Alarm conditions and failure modes will be communicated via the accompanying audible alarm and visual indicator.
Available on IIS 1100 and IISCN models.

SDC – Summary Dry Contacts
Provides Dry Form “C” Contacts (rated at 5 amps maximum at 250VAC/30VDC) that change state when any system alarm activates. These contacts can be used to provide a continuity path to an external monitoring device (not provided), such as a Building Management System (BMS) or Indicator Panel for remote monitoring of the IIS Inverter’s alarm status. The Summary Dry Form C Contacts will change states with the following alarms (if available): high battery charger fault, near low battery, low battery, load reduction fault, output overload, high/low AC input volts, high ambient temperature, inverter fault, and system test fault. The Summary Dry Contacts can also be configured to change state when optional circuit breaker trip alarms are triggered (see OTA option).
Available on IIS Single Phase, IISC, IISM, IIS3P, and IISCN3P models.

SNMP – Serial to Ethernet Network Adapter
Equips the IIS Inverter System with an RJ-45 Ethernet port for remote communications to a Building Management System (BMS) or Network Manager via SNMP protocol. The SNMP interface supports standard IP network settings including DHCP or static IP address, subnet mask, and default gateway. The SNMP interface supports SNMP v1 and v2c, and supports the programming of SNMP traps when user-defined alarm conditions are met. The SNMP interface supports standard “SNMP Get,” as well as standard SNMP MIB walking via “SNMP Get Next,” and provides read-only objects (OIDs) for the following telemetry about the IIS Inverter System:

Input Voltage(s)
Output Voltage(s)
Output Current(s)
Total Output Power
Ambient Temperature
Battery Voltage
Battery Current
Total Time on Battery (in Emergency Mode)
Days of Operation
Results of the Inverter’s last automatic monthly self-test
Results of the inverter’s last automatic yearly self-test
Alarm states include no utility, on battery, battery low, input voltage high/low, inverter failure detected, inverter overloaded and overload shutdown, ‘load reduction’ activated, ambient temperature high, and battery charger fault.
Available on IIS Single Phase, IISC, IIS3P and IISCN3P models.

SPAREF – Spare Fuses

Provides spare fuses for the IIS Inverter System.
Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

SPARES – Spare Fuses and Circuit Boards

Provides spare fuses and circuit boards for the IIS Inverter System.
Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

ST – Standard Transfer

Single Phase ST (Standard Transfer) models will transfer to battery power (emergency mode) when AC utility power is interrupted for more than one line cycle (50ms). This allows IIS Single Phase FT models to be compatible with most lighting types including LED, Fluorescent, Incandescent, and Quartz lamps. IIS Single Phase ST models are considered “interruptible.”
Available on IIS Single Phase models.

STAINLESS – Stainless Steel Enclosure

Outfits IIS EXT Outdoor Inverter Systems with a stainless steel enclosure to protect against corrosion from exposure to salt water or environments where corrosive gas or moisture is present.
Available on IIS EXT (excluding 1750) and IIS3P EXT models.

STRAP – Battery Strapping

Provides battery strapping to secure the batteries in the enclosure.
Available on IIS 1100, IISC, and IISCN models.

STRAPW – Battery Strapping and Wall Mount Bracket

Includes options STRAP and WALL. Provides a wall mount bracket to mount the IIS Inverter to the wall and battery strapping to secure the batteries in the enclosure.
Available on IISC models.

SZ – Seismic Rating with Shaker Table Testing for OSHPD

IIS SZ and IIS3P SZ models are designed and built to meet Seismic Zone 4 (the highest seismic zone rating) conditions and undergo thorough withstand testing to meet OSHPD certification requirements. These models undergo shaker table withstand testing to an SDS level of 2.5g in accordance with ICC-ES-AC-156 procedures. If OSHPD certification is not needed, many IIS models offer Seismic Zone Mounting (see SZM option) for increased durability and safety in seismic zone installations.
Available on IIS Single Phase and IIS3P Models.

SZM – Seismic Zone Mounting

Provides an additional base and battery strapping (on certain models) for seismic mounting to the floor. Note: this option does not include shaker testing to meet OSHPD/ICC requirements. IIS SZ or IIS3P SZ models must be purchased for seismic applications where shaker testing is required.
Available on IIS Single Phase, IISC, IISM, IIS3P and IISCN3P models.

TREG(#), TCAN, TMEX – Extended On-Site Training

Empower facility staff to confidently maintain the IIS Central Inverter System with Extended On Site Training. An addition to the IIS Factory Startup program, Extended On Site Training is conducted at the job site by a qualified IIS Inverter technician for the benefit of any on-site personnel. The training features a deep dive into the system operation, safety procedures, and maintenance of the IIS Central Inverter. The agenda may be customized at the time of service by the IIS Inverter technician to accommodate the needs of the attendees. See iotaengineering.com for more details on what Extended On Site Training entails. Requires factory startup (see FSREG#, FSCAN, FSMEX) to be ordered. Available on IIS 1100, IIS Single Phase, IIS EXT, IISC, IISM, IIS3P, IIS3P EXT, IISCN, and IISCN3P models.

VRLA10 – 10-Year Long Life VRLA Batteries
Note: IIS EXT 1750 models automatically come with 10-year long-life VRLA batteries as standard. This option equips the IIS EXT and IIS3P EXT Inverter System with 10-year long-life VRLA batteries for extended battery operation. Standard batteries in IIS EXT and IIS3P EXT systems have an operating lifespan of 5 years. This option extends the battery lifespan to up to 10 years of normal operation. Available on IIS EXT (excluding 1750) and IIS3P EXT models.

VRLA20 – 20-Year Long Life VRLA Batteries
This option equips the IIS and IIS3P Inverter System with 20-year long-life VRLA batteries for extended battery operation. Standard batteries in IIS Single Phase and IIS3P systems have an operating lifespan of 10 years. This option extends the battery lifespan to up to 20 years of normal operation. Available on IIS Single Phase and IIS3P models.

WALL – Wall Mount Bracket

Provides a wall mount bracket for securing the IIS Inverter System to a building wall. Available on IISC and IISM models.

ZM(#) – Zone Monitoring
Allows the IIS Inverter System to monitor the presence of AC power in a specific zone (ex: area circuit or distribution panel). Upon loss of normal power in the zone(s), the inverter will switch to emergency mode and power any connected emergency equipment via its internal battery. Any normally-off loads will turn on and normally-on loads will remain on. Once AC power is restored to the zone(s), the inverter will return to normal mode. Any normally-off loads will turn off and normally-on loads will continue operating via AC utility power. Available on IIS Single Phase, IIS EXT (excluding 1750), IISC, IIS3P, IIS3P EXT, and IISCN3P models.

If you would like further information on IOTA IIS Central Inverter Systems, or have additional questions on IIS Inverter Options, please visit us online at www.iotaengineering.com or call us at 1-800-866-4682

Table 1: Option Availability per Model

Option is available Option is not available IIS Inverter Series