Chapter 16. Built-in high speed counter of GM6-CPUC
16-5
16.4. Wiring
16.4.1. Wiring instructions
A high speed pulse input is sensitive to the external noise and should be handled with special
care. When wiring the built-in high speed counter of GM6 -CPUC, take the foll owing
precautions against wiring noise.
1) Be sure to use shielded twisted pair cables. Also provide Class 3 grounding.
2) Do not run a twisted pair cable in parallel with power cables or other I/O lines which
may generate noise.
3) Before applying a power source for pulse generator, be sure to use a noise-
protected power supply.
4) For 1-phase input, connect the count input signal only to the phase A input; for 2-
phase input, connect to phases A and B.
16.4.2. Wiring examples
1) Voltage output pulse generator
Pulse Generator
CHSC
A
B
COM
24V
24VG
2) Open collector output pulse generator
Pulse Generator
CHSC
A
B
COM
24V
24VG