GarrettCom 6K8 - Manual (Page 73)

Magnum 6K8-Series Industrial Field Switch Installation and User Guide (04/07)
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Before connecting hot lines to the Terminal Block of –48VDC, 24VDC or
125VDC, always use a digital voltmeter to measure the output voltage of the power
supply and determine the lead, which is more “+ve potential”. The more “+ve” voltage
lead from 48V or –48V supply must be connected to the post labeled “+”.
B4.1 UL Requirements for DC-powered units
1. Minimum 18AWG cable for connection to a Centralized DC power source.
2. Minimum 14AWG cable for connection to a earthing wiring.
3. Use only with Listed 10 A circuit breaker provided in building installation.
4. “Complies with FDA radiation performance standards, 21 CFR subchapter J.”
or equivalent.
5. Fastening torque of the lugs on the terminal block: 9 inch-pound max.
6. Centralized DC Power Source cable securement, use at least four cable ties of
14AWG(min) to secure the cable to the rack at least 4 inches apart, with the
first one located within 6 inches of the terminal block.
B5.0 OPERATION
Operation of Magnum 6K8-Series Switches with the optional -48VDC, 24VDC
and 125VDC power supply is identical to that of the standard AC-powered models.
Similarly to order the optional 24VDC or 125VDC industrial specific power
supply factory installed, add a suffix of “24VDC” or “125VDC” after the product ‘s
standard model #. Example: Magnum 6K8-Series- 24VDC, Magnum 6K8-Series-
125VDC.
B7.0 TROUBLESHOOTING
Please refer to Section 6.0 for troubleshooting
APPENDIX C: Internal DC Dual-Source Power Option
C1.0 SPECIFICATIONS - FOR MAGNUM 6K8-SERIES FIBER SWITCH
Power Supply (Internal, -48VDC Dual-Source, model # Dual-Src-48V)
DC Power Connector: First Source: “A+”, “A -“ , 2nd Source “B - “, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 36 - 70 VDC
Power Supply (Internal, 24VDC Dual-Source, model # Dual-Src-24V)
DC Power Connector: First Source: “A+”, “A -“ , 2nd Source “B - “, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 18 - 36 VDC
Power Supply (Internal, 125VDC Dual-Source, model # Dual-Src-125V)