Cameron Scanner 3100 EFM - External Power Supply

Should the primary power supply fail, take the following precautions to maximize battery life:
• Ensure calculation frequency is no greater than once per minute.
• Ensure logging frequency (interval) is no greater than once per hour.
• Ensure download frequency is no greater than once per month.
• Avoid operating at extremely cold temperatures.
• Avoid the use of digital outputs (pulse or alarm).
• Avoid the use of analog inputs.
• Avoid the use of the Ethernet port (web interface access).
• Avoid powering an external transmitter with the Scanner 3100.
External Power Supply
The Scanner 3100 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 150 mA minimum (9 to 24 VDC at 150 mA for installations in Mexico).
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.
ATEX-approved devices should be powered with an external SELV power supply (Um = 30 VDC) and an internal 7.8 V
battery pack as backup, per ATEX Certicate Number Sira 15ATEX 1122X.
Caution All eld wiring must conform to the National Electrical Code, NFPA 70, Article 501-4(b) for installa-
tions within the United States or as specied in Section 18-156 of the Canadian Electrical Code for
installations within Canada. Local wiring ordinances may also apply. All eld 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
eld 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.
Figure 3.4—External power supply
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Section 3 Scanner 3100 EFM