B METERS ISMA-B-MIX18-IP Bacnet and Modbus IO Module Installation Guide

: September 3, 2024
: B METERS

Table of Contents

B METERS ISMA-B-MIX18-IP Bacnet and Modbus IO Module
SPECIFICATION
TOP PANEL
TERMINALS OF THE DEVICE
RS485 BIASING RESISTORS
POWER SUPPLY CONSIDERATIONS
FCC
WIRING
INSTALLATION
FAQ
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

B METERS ISMA-B-MIX18-IP Bacnet and Modbus IO Module

Specifications

Power supply : Universal inputs
Digital inputs: 5x voltage, current, and resistance measurement, dry contact
Analog outputs: 4x 0-10 V DC output
Digital outputs: 4x relay output
Interface: RS485 half-duplex, Modbus or BACnet, Ethernet, Modbus TCP/IP or BACnet IP
Baudrate: Set by switch in range from 2400 to 115200 bps
Ingress protection rating: IP40 – for indoor installation
Temperature: 5 to 95% RH (without condensation)
Connectors Dimension: 88x110x62 mm (3.46×4.33×2.44 in)
Mounting: DIN rail mounting (DIN EN 50022 norm)
Housing material: Plastic, self-extinguishing PC/ABS

SPECIFICATION

Power supply	DC: 24 V ± 20%, 4.4 W; AC: 24 V ± 20%, 6.6 VA
Universal inputs	5x voltage, current and resistance measurement, dry contact
Digital inputs	5x dry contact input, high-speed pulse counter up to 100 Hz
Analog outputs	4x 0-10 V DC output, maximum load up to 20 mA per channel,

60 mA maximum total load for analog outputs

Digital outputs

| 4x relay output| Maximum ratings| UL compliant

ratings

Resistive load max.| 3 A @ 230 V AC

3 A @ 30 V DC

| 3 A @ 24 V AC

3 A @ 30 V DC

Inductive load max.| 75 VA @ 230 V AC

30 W @ 30 V DC

| 8 VA @ 24 V AC

30 W @ 30 V DC

Interface| RS485 half-duplex, Modbus or BACnet, up to 128 devices on

the bus, Ethernet, Modbus TCP/IP or BACnet IP

Address| Set by switch in range from 0 to 99
Baudrate| Set by switch in range from 2400 to 115200 bps
Ingress protection rating| IP40 – 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)

TOP PANEL

UNIVERSAL INPUTS/DIGITAL INPUTS

DIGITAL OUTPUTS/COMMUNICATION /POWER SUPPLY

ANALOG OUTPUTS

WARNING

Note, an incorrect wiring of this product can damage it and lead to other hazards. Make sure the product has been correctly wired before turning the power ON.
Before wiring, or removing/mounting the product, be sure to turn the power OFF. Failure to do so might cause electric shock.
Do not touch electrically charged parts such as the power terminals. Doing so might cause electric shock.
Do not disassemble the product. Doing so might cause electric shock or faulty operation.
Use the product within the operating ranges recommended in the specification (temperature, humidity, voltage, shock, mounting direction, atmosphere etc.). Failure to do so might cause fire or faulty operation.
Firmly tighten the wires to the terminal. Insufficient tightening of the wires to the terminal might cause fire.

TERMINALS OF THE DEVICE

RS485 BIASING RESISTORS

POWER SUPPLY CONSIDERATIONS

Electrical safety in the building automation and control systems is 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 EN 60730-1.
Protection against electric shock is ensured by the following measures:
- limitation of voltage (low voltage AC/DC 24V 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

FCC COMPLIANCE NOTE

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, under 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 by 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 measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to 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

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).

WARNING

Before wiring or removing/mounting the product, make sure to turn the power off. Failure to do so might cause an electric shock.
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.
Do not touch electrically charged parts such as power terminals. Doing so might cause an electric shock.
Do not disassemble the product. Doing so might cause an electric shock or faulty operation.
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.
Firmly tighten the wires to the terminal. Failure to do so might cause a fire.
Avoid installing the product in close proximity to high-power electrical devices and cables, inductive loads, and switching devices. Proximity of such objects may cause an uncontrolled interference, resulting in an instable 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.

WARNING: Electrical installation of this product must be done in accordance with national wiring codes and conform to local regulations.

B METERS UK | www.bmetersuk.com | iSMA

FAQ

Q: What should I do if I have questions after reading the manual?
- A: Contact the iSMA CONTROLLI Support Team at support@ismacontrolli.com for assistance.
Q: How should I handle wiring for the device?
- A: Ensure you use appropriate suppressing elements like snubbers or varistors for AC voltage and freewheeling diodes for DC voltage loads. Connect these elements close to the coil for effective operation.