Attaching Dc Power To The Poe Expansion Modules - Cisco IE 3000 Hardware Installation Manual
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Verifying Switch Operation
Attaching DC Power to the PoE Expansion Modules
If your switch configuration includes either the IEM-3000-4PC or the IEM-3000-4PC-4TC PoE
expansion modules, you must attach source DC directly to the expansion module's Input DC terminal
block. Source DC can come from either the PWR-IE65W-PC-DC, a DC-input power supply, the
PWR-IE65W-PC-AC, an AC-input power supply, or from site source DC; however, site source power
voltage must be 48–54VDC.
If you are using the above Cisco PoE AC/DC power supplies, you can power up to 4 PoE or 2 PoE+
devices on each expansion module.
To attach site source DC to the expansion module:
Warning
The equipment is to be connected to a UL Listed, limited power source. Statement 170
When you connect or disconnect the power and relay connector with power applied, an electrical arc
Warning
can occur. This could cause an explosion in hazardous area installations. Be sure that power is
removed from the switch and alarm circuit. Be sure that power cannot be accidentally turned on or
verify that the area is nonhazardous before proceeding.
Failure to securely tighten the power and relay connector captive screws can result in an electrical
arc if the connector is accidentally removed. Statement 1058
Step 1
Verify that power is off to the DC circuit you are going to attach to the DC-input power supply. As an
added precaution, place the appropriate safety flag and lockout devices at the source power circuit
breaker, or place a piece of adhesive tape over the circuit breaker handle to prevent accidental power
restoration while you are working on the circuit.
Measure a length of twisted-pair copper wire long enough to connect the site source DC to the PoE
Step 2
expansion module's Input DC terminal block.
For DC connections from the site source DC to the PoE expansion module, use 18-AWG (0.75 mm
twisted-pair copper wire, such as Belden part number 9344 or the appropriate type, wire size, and
color-code for your country.
Using a wire-stripping tool, strip both ends of the twisted pair wires to 0.25 inch (6.3 mm) ± 0.02 inch
Step 3
(0.5 mm). Do not strip more than 0.27 inch (6.8 mm) of insulation from the wires.
Attach the twisted-pair wire leads into the site source DC positive (+) and negative (-) connectors. Verify
Step 4
that only insulated wire extends from the connectors.
Step 5
Secure the twisted-pair leads to the source DC connectors.
Step 6
Connect the other end of the twisted-pair wire leads to the Input DC terminal block connectors on the
PoE expansion module making sure that only insulated wire extends beyond the terminal block.
Verify that the positive (+) wire goes from the source DC positive (+) connector to the positive (+)
connector on the expansion module and that the source DC negative (-) wire goes to the negative (-)
connector on the expansion module.
Secure the twisted-pair leads to the terminal block connectors using the torque ratchet screwdriver to
Step 7
tighten the expansion module terminal block screws.
Cisco IE 3000 Switch Hardware Installation Guide
B-26
Appendix B
Installation In a Hazardous Environment
2
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