Omron SYSMAC C500, Installation Manual

Page: 42 / 112

Section 4
System Connections
34
Terminal Block
The terminal block of an I/O Unit can be removed by loosening the mounting
screws. You do not have to remove the lead wires from the terminal block in or-
der to remove it from an I/O Unit.
Note Putting I/O Lines and high-tension lines or power lines in the same
duct or conduit may cause the I/O Lines to be affected by noise. This
may cause a malfunction in the I/O Unit or may cause damage to the
I/O Unit or I/O devices.
Terminal block mounting screws
Loosen the terminal block mounting screws to remove
the terminal block from the I/O Unit. Make sure the
mounting screws on the terminal block are tightened af-
ter wiring is complete, and the terminal block is re-
mounted to the I/O Unit.
Note When a Triac Output Unit is used to drive a low-current load, the load
may not turn completely OFF due to a leakage current. To compen-
sate for the leakage current, connect a bleeder resistor in parallel
with the load.
Wiring Examples
The following are examples of how to connect I/O devices to I/O Units. During
wiring, work slowly and carefully. If an input device is connected to an Output
Unit, damage may result. Check all I/O devices to make sure they meet the
specifications (refer to
Appendix B Specifications). Be sure to allow for leakage
current and load inductance.
DC Input Units
COM
Contact output
IN DC input
When using the following configurations, the sensor and Input Unit should re-
ceive their power from the same supply.