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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.
Summary of Contents for SYSMAC C500
Page 1: ...Cat No W132 E1 4 Programmable Controller SYSMAC C500...
Page 2: ...C500 Programmable Controller Installation Guide Revised May 2000...
Page 37: ...29 SECTION 4 System Connections 4 1 Current Consumption 30 4 2 I O Connections 33...
Page 49: ...43 SECTION 6 Power Considerations...
Page 54: ...49 SECTION 7 Safety Considerations...
Page 58: ...53 A Inspection and Maintenance 54 B Specifications 57 C Standard Models 97 Appendix...
Page 96: ...Appendix B Specifications 91 A shape I O Unit B shape I O Unit...
Page 97: ...Specifications Appendix B 92 C shape I O Unit D shape I O Unit...