IO Modules

Metz BMT-DIO4/2

The Metz Connect BMT-DIO4/2 Modbus IO 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 2 light strips or controlling louvers. It can also be used to control 2 motorised fire dampers. In this case it is necessary to protect the relay contacts by appropriate load-dependent measures.


Niagara Framework and any BMS


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The inputs can be used as contact or voltage inputs. The inputs and outputs can be switched and scanned by means of standard registers via a Modbus master. The BMT-DIO4/2 IO Module address, bit rate and parity are set with 2 rotary switches on the front or by software. Suitable for decentralised mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets.

Modbus RTU

00 to 99

RS485 (two-wire bus)

1200 to 115200 bit/s

24 V AC/DC +/- 10 % (SELV)

200 mA (AC) / 75 mA (DC)

100 %

4 x digital

30 V AC/DC

more than 7 V AC/DC

2 changeover contacts (DPDT)

0.5 A / output

0.8 A (less than 30 s)

10 A (less than 20 ms)

Green, red and yellow LED

35 x 69.3 x 60 mm

95 g

-5 °C to 55 °C

-20 °C to 70 °C

IP40 / IP20

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