BMT-AI8

I/O BACnet MS/TP Module with 8 individually configurable resistance or voltage inputs.

For those installations that support a fieldbus solution such as BACnet MS/TP, Contemporary Controls provides solutions for expanding the number of I/O points in the field. These compact cost-effective modules are available with analog and digital inputs and outputs in varying combinations.

The BACnet MS/TP module with 8 individually configurable resistance or voltage inputs is designed for local switching operations. It is suitable to record resistance or voltage values of for example passive and active temperature sensors electrical ventilation or mixing valves, valve positions etc. The inputs are universally configurable by standard object via a BACnet-Client. Addressing of the module and baud rate setting are done with the two address switches (x1 / x10) on the front. Possible settings are addresses 00 to F9 and baud rates 9600 Bd, 19200 Bd, 38400 Bd, 57600, 76800 Bd and 115200 Bd.

Specification:

BACnet Interface

• Protocol: BACnet MS/TP
• Transmission rate: 9600 ... 115200 Bd (factory setting 9600 Bd)
• Cabling: RS485 two wire bus with voltage equalizing cable in bus / line topology; terminate with 120 Ohms

Inputs

• Resistance range: 40 Ohms to 4 MOhms
• Voltage input: 0~10 V DC
• Resolution: 10 mV
• Error: about ±100 mV

Power Supply

• Operating voltage range: 20~28VAC/VDC (SELV)
• Current consumption: 65 mA (AC) / 25 mA (DC)
• Relative duty cycle: 100%
• Protective circuitry:
• Polarity reversal protection of operating voltage
• Polarity reversal protection of supply and bus

Mechanical

• Casing: Polyamide 6.6 V0
• Cover plate: Polycarbonate
• IP protection: Casing - IP40, Terminal blocks - IP20
• Dimensions (WxHxD): 50 x 70 x 65 mm
• Weight: 104g
• Mounting: DIN rail
• Mounting in series without space: maximum quantity of modules connected in line is limited to 15 or to a maximum power consumption of 2 Amps (AC or DC) per connection to the power supply

Environmental

• Operating temperature: -5°C to 55°C
• Storage temperature: -20°C to 70°C

Manufacturer's warranty: 36 months

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