4/04 IO-LC1, IO-LC3 I/O Expansion Modules
Unitronics Industrial Automation 5
External Power Supply
All of the IO-LC1, IO-LC3 I/O signals are isolated from the controller bus, but are not isolated from the power
supply input. If required, you can provide full isolation by using a separate isolated power-supply.
1. Connect the "positive" cable to the "+V" terminal, and the "negative" cable to the "0V" terminal.
Do not connect the 'Neutral' or 'Line' signal of the 110/220VAC to any of the module's
terminals.
In case of voltage fluctuations or non-conformity to voltage power supply
specifications, connect the module to a regulated power supply.
Earthing the module
To maximize system performance, avoid electromagnetic interference by earthing the module.
1. Connect one end of a wire, 14 AWG, to the chassis signal; connect the other end to the cabinet chassis.
This assumes that the cabinet is properly earthed. If this is not the case, do not earth the module.
Caution
The wire used to earth the module must not exceed 8 cm in length. If your conditions
do not permit this, do not earth the module.
Do not earth the module via the Loadcell cable shield.
External power supply and Digital I/O wiring
Digital I/Os
Refer to External power supply and Digital I/O wiring above for wiring guidelines.
See Earthing the module
guidelines above.
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