BMT-DI4

I/O BACnet MS/TP Module with 4 digital 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 4 digital inputs was developed for decentralized switching tasks. It is suitable for detecting potential-free switch states, for example electrical limit switches on vent valves or auxiliary contacts of power contactors. The inputs can be operated by means of potential-free switches or contacts or used as voltage inputs. The inputs can be scanned by means of standard objects via a BACnet client. The module is addressed and the baud rate is 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

Power Supply

• Operating voltage range: 20~28VAC/VDC (SELV)
• Current consumption: 50 mA (AC) / 20 mA (DC)
• Relative duty cycle: 100%
• Voltage input: 30 VAC/VDC
• High-signal recognition: > 7 VAC/VDC
• 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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