Omron V022-E3-1 operation manual 3-2-2Power Supply Connection, Section

%￿￿￿￿￿￿￿￿￿￿￿ Section 2-2

3-2-2 Power Supply Connection

	Connect a 24 VDC power supply to the power input terminals.
Note	Use 2 mm2 or thicker wires to prevent voltage drop. Twist the wires together for
	wiring.
	Make sure you connect the power supply wires with the correct polarity.
	Do not connect AC power to the DC terminals.
	If the power supply voltage does not conform to the stipulated rating, it could
	￿destroy the terminal or burn internal circuits.
	If complying with EC directives (low voltage directives), observe the following
	points:
		➀ Use a power supply with reinforced insulation to supply power to the PT.
		➁ 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
			cannot touch any part of it apart from the part where PT operations are per-
			formed (the front panel).
	24 VDC
			+

Breaker

24 VDC Power Supply

Reference When using an C200H direct communication the NT600S must be started up be- fore the host. For details, refer to “Switching the Power ON/OFF When Using C200H Direct” (page 62). When not using C200H direct communication, there are ￿no restrictions on the order in which power supplies are switched ON and OFF.

Noise prevention

The NT600S has a noise preventive feature against the power supply line noise.

To further reduce noise, connect a noise filter to the power line. This will drasti-

￿cally reduce the ground noise. 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	20.4 VDC to 26.4 VDC
voltage fluctuation range	(24 VDC --15%, +10%)
￿Power supply capacity	ST121(B)-EV￿15W over	ST211(B)-EV￿25W over

Parts used for connection

Caution For the connection to the power supply terminal block, twisted wires of 2 mm2 or greater cross sectional area and M 3.5 size crimp terminals must be used.

Use crimp terminals to connect the power supply to the power input terminals.

Recommended crimp terminals for M3.5 are given below.

Tighten the screws on the terminal block to a torque of 0.8 N·m.

￿￿