Omron CQM1H - 08-2005 Operation Manual page 143

Wiring and Connections
DC Power Supply Unit
Wiring
!Caution Be sure that the DC power supply voltage remains within the allowed fluctua-
Crimp Connectors
Terminal Block
Note
118
The following diagram shows the proper connections to a DC power supply.
Use a 24-V DC power supply. Refer to 3-2-2 Selecting a Power Supply Unit for
details on Power Supply Unit capacity.
Use power lines of 2 mm
Twist
tion range of 20 to 28 V DC.
Use M3.5 crimp connectors of the dimensions shown below for wiring DC
Power Supply Units.
7 mm max.
Note Always use crimp connectors for wiring. Do not connect bare stranded wires
directly to terminals.
The following diagram shows the terminal block for the DC Power Supply Unit.
1. The wire used should be at least 2 mm
2. Provide the grounding point as close to the CQM1H PC as possible.
3. Tighten the terminal screws to a torque of 0.8 N ⋅ m.
4. LG ( ):
Noise filter neutral terminal. Short-circuit the LG (
( ) terminals using the attached short-circuit bar and ground them at a
resistance of less than 100 Ω to reduce noise and prevent electric shock.
5. GR ( ):
Protective earth terminal. Connect to a separate ground wire of at least 2
2
to ground the terminal at a resistance of less than 100 Ω to prevent
mm
electric shock.
6. To satisfy the EC directives (low-voltage directive), provide reinforced insu-
lation or double insulation for the power supply.
2
min.
Breaker
CQM1-PD026
DC
Provide a 24-V DC power supply.
input
Noise filter neutral terminal
LG
(see note 4)
GR Protective earth terminal
(see note 5)
NC
NC
Section 4-7
DC power supply
7 mm max.
2
.
) terminal and GR