BMT-DIO4-2

I/O BACnet MS/TP Module with 4 digital inputs and 2 relay 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 inputs and 2 relay outputs with manual control was developed for decentralized switching tasks. It is suitable for accommodating, for example, light switches and window contacts in a room, switching two light strips or controlling louvers. It can also be used to control 2 motorized fire dampers. With strong inductive loads, we recommend protecting the relay contacts with an RC element. The inputs can be used as contact or voltage inputs. The inputs and outputs can be switched and scanned by means of standard objects via a BACnet client. The module address and the baud rate are set by means of two address switches on the front.

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

• Voltage input: 30 V AC/DC
• High-signal recognition: >7 V AC/DC

Outputs

• Output contacts: 2 x changeover contacts
• Switching voltage max.: 250 V AC
• Continuous current max: 16 A / relay (80 A / 20 ms)
• Total current for all contacts: 25 A

Power Supply

• Operating voltage range: 20~28VAC/VDC (SELV)
• Current consumption: 200 mA (AC) / 75 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 75 mm
• Weight: 126g
• 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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