iSMA CONTROLLI iSMA-B-12O-H-IP IBC Intelligent Building Controls Instruction Manual
- June 9, 2024
- iSMA CONTROLLI
Table of Contents
iSMA CONTROLLI iSMA-B-12O-H-IP IBC Intelligent Building Controls
Product Information
The iSMA-B-12O-H-IP is a digital output module with a power supply. It has 12 relay outputs with maximum ratings of 3 A at 230 V AC for resistive load (AC1) and 75 VA at 230 V AC for the inductive load (AC3). The module has RS485 and Ethernet communication interfaces with Modbus RTU/ASCII (master) and Modbus TCP/IP or BACnet IP protocols respectively. It supports up to 128 devices on the RS485 bus and can be set by switch in the range from 0 to 99. The baudrate can also be set by switch in the range from 4800 to 115200 bps. The module has an ingress protection rating of IP20 for indoor installation and is made of self-extinguishing PC/ABS material.
Product Usage Instructions
Before using or operating the device, it is important to read the instruction manual carefully. For any questions or concerns, please contact the iSMA CONTROLLI Support Team at support@ismacontrolli.com. The electrical installation of the product must be done in accordance with national wiring codes and conform to local regulations. The device has 12 relay outputs labeled O1 to O12, with O1 to O5 being used for the connection of the electro valve and resistive load, and O6 to O12 being used for the connection of inductive load. Each CX terminal can be supplied by a different PELV/SELV source. The digital outputs have a hand control and their status can be seen on the top panel of the module. The RS485 communication interface supports up to 128 devices on the bus and can be set by switch in the range from 0 to 99. The Ethernet communication interface supports Modbus TCP/IP or BACnet IP protocols and can be set by switch. The baudrate of the module can also be set by switch in the range from 4800 to 115200 bps. The module has a switch for setting baudrate, protocol, and restoring the default settings, as well as switches for setting the device address. The device address can be set using S1 and S2 switches with the formula Address = S2*10 +S1. Jumpers must be shorted to enable biasing for RS485 termination. The module has a plastic, self-extinguishing PC/ABS housing material and an ingress protection rating of IP20 for indoor installation. The dimensions of the module are not provided in the manual.
SPECIFICATION
| Power supply | DC: 24 V ± 20%, 4.5 W; AC: 24 V ± 20%, 11.7 VA |
|---|
Digital outputs
| 12 relay outputs| Max. ratings
Resistive load (AC1)| 3 A at 230 V AC, 3 A at 30 V DC
Inductive load (AC3)| 75 VA at 230 V AC, 30 W at 30 V DC
Interface| RS485: Modbus RTU/ASCII (master), up to 128 devices on the bus
Ethernet: Modbus TCP/IP or BACnet IP
Address| Set by switch in the range from 0 to 99
Baudrate| Set by switch in the range from 4800 to 115200 bps
Ingress protection rating| IP20 – for indoor installation
Temperature| Operating: -10°C to +50°C (14°F to 122°F) Storage -40°C to +85°C
(-40°F to +185°F)
Relative humidity| 5 to 95% RH (without condensation)
Connectors| Separable, max 2.5 mm2 (18–12 AWG)
Dimensions| Without HOA: 106.30 x 113.60 x 62.00 mm (4.19 x 4.47 x 2.44 in)
With HOA: 106.30 x 113.60 x 70.00 mm (4.19 x 4.47 x 2.76 in)
Mounting| DIN rail mounting (DIN EN 50022 norm)
Housing material| Plastic, self-extinguishing PC/ABS
TOP PANEL
DIGITAL OUTPUTS
Connection of electro valve
- Every CX terminal can be supplied by a different PELV/SELV source
Connection of resistive load
- Every CX terminal can be supplied by a different PELV/SELV source
Connection of inductive load
- Every CX terminal can be supplied by a different PELV/SELV source
COMMUNICATION
POWER SUPPLY
RS485 TERMINATION
BLOCK DIAGRAM
The performances stated in this sheet can be modified without any prior notice.
EN 60730-1 POWER SUPPLY CONSIDERATIONS
Electrical safety in building automation and control systems are essentially
based on the use of extra low voltage, which is strictly separated from the
mains voltage. This
low voltage is either SELV or PELV according to the EN 60730-1 standard.
Protection against electric shock is ensured by the following measures:
- limitation of voltage (low voltage 24 V AC/DC supply, either SELV or PELV);
- protective separation of the SELV system from all circuits other than SELV and PELV;
- simple separation of the SELV system from other SELV systems, from PELV systems, and earth.
Field devices such as sensors, status contacts, and actuators connected to the
low-voltage inputs and outputs of I/O modules must comply with the
requirements for SELV
or PELV. The interfaces of field devices and other systems must also satisfy
SELV or PELV requirements.
When the supply of SELV or PELV circuits is obtained from supply mains of
higher voltages, it shall be provided by a safety transformer or a converter
designed for continuous operation to supply SELV or PELV circuits.
FCC STATEMENT
FCC COMPLIANCE NOTE
Note: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency
energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measure
- reorient or relocate the receiving antenna;
- increase the separation between the equipment and receiver;
- connect the equipment into an outlet on a circuit different from that to which the receiver is connected;
- consult the dealer or an experienced radio/TV technician for help.
WIRING
- Line power cables must be routed with spatial separation from signal and data transmission cables.
- Analog and digital signal cables should also be separated.
- It is recommended to use shielded cables for analog signals, cable shields should not be interrupted by intermediate terminals.
- The shielding should be earthed directly after the cable enters the cabinet.
- It is recommended to install interference suppressors when switching inductive loads (e.g. coils of contactors, relays, solenoid valves). RC snubbers or varistors are suitable for AC voltage and freewheeling diodes for DC voltage loads. The suppressing elements must be connected as close to the coil as possible.
INSTALLATION GUIDELINES
Please read the instruction before use or operating the device. In case of any questions after reading this document, please contact the iSMA CONTROLLI Support Team (support@ismacontrolli.com).
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Before wiring or removing/mounting the product, make sure to turn the power off. Failure to do so might cause an electric shock.
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Improper wiring of the product can damage it and lead to other hazards. Make sure that the product has been correctly wired before turning the power on.
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Do not touch electrically charged parts such as power terminals. Doing so might cause an electric shock.
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Do not disassemble the product. Doing so might cause an electric shock or faulty operation.
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Use the product only within the operating ranges recommended in the specification (temperature, humidity, voltage, shock, mounting direction, atmosphere, etc.). Failure to do so might cause a fire or faulty operation.
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Firmly tighten the wires to the terminal. Failure to do so might cause a fire.
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Avoid installing the product in close proximity to high-power electrical devices and cables, inductive loads, and switching devices. The proximity of such objects may cause an
uncontrolled interference, resulting in an unstable operation of the product. -
Proper arrangement of the power and signal cabling affects the operation of the entire control system. Avoid laying the power and signal wiring in parallel cable trays. It
can cause interferences in monitored and control signals. -
It is recommended to power controllers/modules with AC/DC power suppliers. They provide better and more stable insulation for devices compared to AC/AC transformer
systems, which transmit disturbances and transient phenomena like surges and bursts to devices. They also isolate products from inductive phenomena from other
transformers and loads. -
Power supply systems for the product should be protected by external devices limiting overvoltage and effects of lightning discharges.
-
Avoid powering the product and its controlled/monitored devices, especially high power and inductive loads, from a single power source. Powering devices from a single
power source causes a risk of introducing disturbances from the loads to the control devices. -
If an AC/AC transformer is used to supply control devices, it is strongly recommended to use a maximum 100 VA Class 2 transformer to avoid unwanted inductive effects,
which are dangerous for devices. -
Long monitoring and control lines may cause loops in connection with the shared power supply, causing disturbances in the operation of devices, including external
communication. It is recommended to use galvanic separators. -
To protect signal and communication lines against external electromagnetic interferences, use properly grounded shielded cables and ferrite beads.
-
Switching the digital output relays of large (exceeding specification) inductive loads can cause interference pulses to the electronics installed inside the product. Therefore,
it is recommended to use external relays/contactors, etc. to switch such loads. The use of controllers with triac outputs also limits similar overvoltage phenomena. -
Many cases of disturbances and overvoltage in control systems are generated by switched, inductive loads supplied by alternating mains voltage (AC 120/230 V). If they
do not have appropriate built-in noise reduction circuits, it is recommended to use external circuits such as snubbers, varistors, or protection diodes to limit these effects.
Electrical installation of this product must be done in accordance with national wiring codes and conform to local regulations.
iSMA CONTROLLI S.p.A. – Via Carlo Levi 52, 16010 Sant’Olcese (GE) – Italy | support@ismacontrolli.com www.ismacontrolli.com Installation Guideline | 1st Issue rev. 1 | 05/2022
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