ONICON System-10 MODBUS - Manual (Page 10)

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System-10-MOD Network Interface Installation Guide 05/14 - 0653-10 / 18321
Page 10
Open Collector Sinking or Dry Contact:
This type of output refers to an open collector switch configured in a current sinking
arrangement or a dry contact switch (see Fig. 4 and 5). Set the selector switch, S1 to Sink.
In either case, the switch must be rated for at least 20mA at 20 VDC.
Fig. 4
Fig. 5
Di3 In (+)
Di3 In (-)
Di3 In (+)
Di3 In (-)
ONICON BTU
Meter
ONICON BTU
Meter