Optionnal I/O Module; Mb-Io Module - Metro DataVac M1 User Manual

M1 – M3 Display units

14. OPTIONNAL I/O MODULE

14.1. MB-IO module

As an option, it is possible to connect up to 4 M-Bus modules with 8 inputs/output
isolated by opto-coupler. (ref MB-IO)
The 8 outputs are similar to the « open collector PNP » type. They can be used with
an external power supply 12 to 30 VDC maximum. The maximal output current
drained by each output is 50mA
The 8 inputs represent a 2.2kOhms load connected to the 0 volt.
Page 81