Omron SmartSlice GRT1 Series Operation Manual page 77

General-purpose Slice I/O Units
Component Names
and Functions
(Same for GRT1-ID4
and GRT1-ID4-1)
Internal Circuits
GRT1-ID4 (NPN)
58
LED indicators
ID4
Indicate the Unit's status.
0
2
Terminal Block
Base block
TS
1
Test pin
3
Release button
Terminal insertion hole
Main block
I/O LED
Internal circuits
Internal circuits
Section 4-6
Terminal block
0
V
G
3
V
G