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4.2 Wiring
4
PROCEDURE FOR STARTING UP A REDUNDANT
SYSTEM
POINT
1. Use the thickest possible (max. 2 mm
2
(AWG 14) wires for the 100/200VAC
and 24VDC power cables. Be sure to twist these wires starting at the
connection terminals.
For wiring a terminal block, be sure to use a solderless terminal.
To prevent short-circuit due to loosening screws, use the solderless terminals
with insulation sleeves of 0.8 mm (0.03 inch) or less.
Also, only two solderless terminals can be connected per terminal block.
2. Supply power to two redundant power supply modules individually (redundant
power supply module).
3. When two redundant power supply modules (Q64RP) are placed together
and operated as a redundant power supply system, it is recommended to use
one of them as an AC power input and connect the other to an uninterruptible
power supply.
4. When LG terminals and FG terminals are connected, be sure to ground the
wires.
Otherwise, the PLC may be susceptible to noise.
Since the LG terminal has a half of the input voltage, touching this terminal
may result in an electric shock.
5. When using the redundant power main base unit, ON (short-circuit) timing of
ERR terminal on the redundant power main base unit is delayed than that of
ERR terminal on the redundant power extension base unit by the CPU
module initial processing time.
Terminal block
Solderless terminals
with insulation sleeves
