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FL SWITCH EP74…
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PHOENIX CONTACT 4083_en_A
a) Connect the positive wire from the power source to the positive/live (+/L), screw #1,
terminal on the terminal block.
b) Connect the negative wire from the power source to the neutral/negative (-/N),
screw #3, terminal on the terminal block.
3. If a DC power supply has been installed in PS2, perform the following steps.
a) Connect the positive wire from the power source to the positive/live (+/L), screw #5,
terminal on the terminal block.
b) Connect the negative wire from the power source to the neutral/negative (-/N),
screw #7, terminal on the terminal block.
4. Torque the wire-clamp screws of the terminal block connector to 0.5 to 0.6 Nm.
5. Reinstall the transparent plastic finger safe cover back onto the face of the terminal
block.
6. Connect pin 12 to the ground of the chassis. The ground terminal is used as the ground
conductor for surge and transient suppression circuitry internal to the unit.
4.5.3 Connecting the ground
LM2
LM1
1 Factory-installed chassis
ground cable
2 Optional grounding cable (pro-
vided by customer)
3 Nut (provided)
1
2
3
Figure 4-8 Connecting ground
Using a braided wire or another appropriate grounding wire, connect the chassis ground lug
to a building ground.
The earth/ground connection must be verified by an electrical engineer or a service person
skilled in electrical installation and grounding.
If the FL SWITCH EP74… is used as cord-connected mains equipment for reliable ground-
ing use it as:
– pluggable equipment type B.
– stationary pluggable equipment type A in a location with equipotential bonding or with
a permanently connected protective earthing conductor.