Omron NT620C, Operation Manual

Page: 40 / 337

2-2 Section Installation
27
2-2-2 Power Supply Connection
Connect a 24 VDC power supply to the power input terminals.
Note - Check the wiring carefully before turning on the power.
- Do not connect an AC power supply to the power supply terminals.
- Use a DC power supply with low voltage fluctuation.
- If complying with EC directives (low voltage directives), observe the following
points:
1. Use a power supply with reinforced insulation to supply power to the PT.
2. If using the EL display type, embed the rear part of the PT in a control panel
so that, after the product has been made ready for installation, the user can-
not touch any part of it other than the part where PT operations are performed
(the front panel).
+
24 VDC GR
Breaker
24 VDC Power Supply
S
Power supply
In order to comply with EC directives, use a SELV power supply.
Applicable power supply specifications are as follows.
Item Value
Power supply voltage 24 VDC
Allowable power supply voltage
fluctuation range 20.4 VDC to 26.4 VDC
(24 VDC –15%, +10%)
Power supply capacity 20 W or over
S
Parts used for connection
Note - For the connection to the power supply terminal block, twisted wires of 0.2
mm
2
or greater cross sectional area and M3.5 size crimp terminals must be
used.
Tighten the screws on the terminal block to a torque of 0.5 N
@
m.
- Do not connect wires that are twisted together directly to the power input termi-
nals. This can cause fire and other hazards.
Use the recommended M3.5 size crimp terminals.
Fork type Round type
7 mm or less 7 mm or less
[Recommended terminals]
Maker
Type
(fork type)
Type
(round type)
Applicable Wire
(stranded wire)
Japan Solderless Terminal MFG 2-YS3A 2-3.5
Fuji Terminal 2-YAS3.5 V2-S3.5 2.0 to 2.63 mm
2
Nichifu Terminal 2Y-3.5 2-3.5