Power Supply Connection - Omron NT20S-ST121B-EV3 User Manual

Installation
2-2-3

Power Supply Connection

!Caution Carefully check the wiring before turning ON the power.
!Caution Do not connect AC power to the DC terminals. Incorrect wiring may result in
Note
Note
Connect a 24 VDC power supply to the power input terminals.
burning.
(1) Depending on how the power is turned ON/OFF, the entire system may
stop. Follow the correct procedure when turning the power ON/OFF. Oth-
erwise the system may operate unpredictably.
(2) Use DC power supplies with low voltage fluctuation. An incorrect power
supply may result in malfunctions.
(3) Do not perform a dielectric strength test. Otherwise, the product may mal-
function.
(4) If complying with EC directives (low voltage directives), use a power sup-
ply with reinforced insulation (compliance with EC directives is planned
for June 1998).
NC
24 V
DC
Power Supply
The applicable power supply specifications are as follows.
Item
Power supply
Allowable power supply voltage fluctuation range
Power supply voltage capacity
Parts Used for Connection
For the connection to the power supply terminal block, use stranded wire of
2
2 mm or greater cross sectional Area (14 AWG stranded wire) and M3.5 size
crimp terminals.
Tighten the screws on the terminal block to a torque of 0.8 N ⋅ m.
Otherwise the product may malfunction.
Fork type
7 mm or less
Recommended Terminals
Maker
Japan Solderless Terminal MFG
Fuji Terminal
Nichifu Terminal
Circuit
breaker
24 VDC
power supply
24 VDC
20.4 VDC to 27.6 VDC
(24 VDC −15%, +15%)
10 W or more
Round type
7 mm or less
Fork type Round type
2-YS3A 2-3.5
2-YAS3.5 V2-S3.5
2Y-3.5 2-3.5
Section 2-2
Value
Stranded wire
size
2
2.0 to 2.63 mm
(14 to 13 AWG)
23