Omron SYSMAC CV1000 Installation Guide

65
Output Surge Current When connecting a T ransistor or T riac Output Unit to an output device having a
high surge current (such as an incandescent lamp), care must be taken to avoid
damage to the Output Unit. The T ransistor and T riac Output Units are capable of
withstanding a surge current of ten times the rated current. If the surge current
for a particular device exceeds this amount, use one of the following circuit con -
figurations to protect the Output Unit.
OUT
COM
L
R
+
The above circuit protects the Output Unit by letting the load draw a small current
(about one third the rated current) while the output is OFF , significantly reducing
the surge current. The following circuit reduces the surge current by employing a
current-limiting resistor.
LOUT
COM
+
R
A Transistor Output Unit’s output cannot be directly connected to a TTL input
because of the transistor’s residual voltage. When connecting TTL circuits to
transistor
Output Units, connect a pull-up resistor and a CMOS IC between the
two.
3-5-3 Wiring Examples
The following examples illustrate 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 spec -
ifications (refer to Appendix B Specifications ). Be sure to allow for leakage cur -
rents and load inductance.
Input Units
DC Input Units
COM
Contact output
IN DC input
Transistor Output Residual
Voltage
Wiring I/O Units Section 3-5

Omron SYSMAC CV1000 Specifications

General

Brand	Omron
Model	SYSMAC CV1000
Category	Controller
Language	English