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. In this case it is necessary to protect the relay contacts by appropriate load-dependent measures. 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. Suitable for decentralized mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets. Connection with screw type terminal blocks

• Protocol : BACnet MS/TP
• Address range : 00 to F9
• Bus interface : RS485 (two-wire bus)
• Transmission rate : 9600 to 115200 bit/s
• Operating voltage : 24 V AC/DC +/- 10 % (SELV)
• Current consumption : 200 mA (AC) / 75 mA (DC)
• Relative duty cycle : 100 %
• Inputs : 4 x digital
• Input / voltage : 30 V AC/DC
• Input / high signal more than : 7 V AC/DC
• Output / contacts : 2 changeover contacts (DPDT)
• Output / switching voltage : 250 V AC
• Output / continuous current : 16 A / output
• Output / switch-on current : 80 A (less than 20 ms)
• Display : Green, red and yellow LED
• Dimensions (W x H x D) : 50 x 69.3 x 60 mm
• Weight : 126 g
• Operating temperature range : -5 °C to +55 °C
• Storage temperature range : -20 °C to +70 °C
• Ingress protection for housing / terminal block : IP40 / IP20

1. Datasheet – BMT-DIO4/2