BMT-DO4

I/O BACnet MS/TP Module with 4 digital outputs.

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 4 digital outputs is designed for local switching operations. It is suitable to operate electrical components such as motors, contactors, lamps, sun-blinds etc. We recommend to protect the relay contacts additionally by a RC-element or high inductive loads. The module is provided with a manual control facility for manual switching of the relays. The outputs can be operated by standard objects 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 Bd, 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

Outputs

• Output contacts: 4 x changeover contacts
• Switching voltage max.: 250 V AC
• Continuous current max: 5 A per relay
• Total current for all contacts: 12 A
• Switching frequency: 360 switching cycles per hour

Power Supply

• Operating voltage range: 20~28VAC/VDC (SELV)
• Current consumption: 200 mA (AC) / 70 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): 35 x 70 x 65 mm
• Weight: 95g
• 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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