IO Modules

Metz BMT-SI4

The Metz Connect BMT-SI4 BACnet MS/TP IO module with 4 S0 inputs to DIN EN 62053-31 class A was developed for decentralised switching tasks.

It is suitable for counting S0 counter pulses. This allows very good integration of the module into an energy controlling system. In case of a power failure, the last counter readings are saved.


Niagara Framework and any BMS


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The inputs can be scanned by means of standard objects via a BACnet client. The BMT-SI4 IO module is addressed and the baud rate is set by means of two address switches on the front. Suitable for decentralised mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets.


00 to F9

RS485 (two-wire bus)

9600 to 115200 bit/s

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

170 mA (AC) / 65 mA (DC)

100 %

4 x S0 input, class A

DIN EN 62053-31

Green, red and yellow LED

35 x 69.3 x 60 mm

83 g

-5 °C to 55 °C

-20 °C to 70 °C

IP40 / IP20

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