Sensia 3300 EFM, Installation, Operation & Maintenance Manual

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Power Supply Wiring
External Power Supply
The Scanner 3300 can be connected to a remote DC power supply ( Figure 3.4 ). The power supply and cable must be ca -
pable of supplying 9 to 30 VDC at 400 mA minimum.
The external power supply used with CSA-approved units must be an approved SELV source, insulated from the AC
main by double/reinforced insulation per CSA C22.2, No. 61010-1-04/UL 61010-1, 2nd Edition. .
Caution All field wiring must conform to the National Electrical Code, NFPA 70, Article 501-4(b) for installa-
tions within the United States or as specified in Section 18-156 of the Canadian Electrical Code for
installations within Canada. Local wiring ordinances may also apply. All field wiring must have a
wire range of 22 to 14 AWG and terminal block screws must be tightened to a minimum torque of 5
to 7 in-lb. to secure the wiring within the terminal block. Only personnel who are experienced with
field wiring should perform these procedures.
Important In all applications using an external power supply, a switch or circuit breaker must be included in
the safe area within easy reach of the operator. The switch or circuit breaker must be marked as
the “disconnect” for the safe area external DC power supply.
Power supply
9 to 30 VDC
(400 mA min.)
Figure 3.3 - External power supply
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Section 3 Scanner 3300 EFM