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Appendix D
GCM Specifications
Environmental
Maximum ambient temperature: 50°C (122°F)
Minimum ambient temperature: -10°C (14°F)
Power
Supply voltage: 24 VDC +/- 1V
Power consumption: 8W nominal, 12W maximum
Power dissipation: 5W nominal, 10W maximum
Loadcell Inputs (2)
Excitation voltage: 5 VDC
Excitation current: 300mA (max)
Tachos (2)
Supply voltage: 5 VDC
Supply current: 400mA, maximum (total)
Analog Inputs
Input impedance (Current input): 200 ohms
Input impedance (Voltage input): 100Kohms
Analog Outputs (2)
4-20mA, 1000 ohm maximum
Digital Inputs (4)
Note: Standard GCM digital inputs require external voltage sourcing, jumper selectable for
24VDC, 120 VAC, or 240 VAC.
Input impedance at 24 VDC: 7.5 KΩ
Input impedance at 120 VAC: 64 KΩ
Input impedance at 240 VAC: 120 KΩ
Digital Outputs (4)
Note : Standard GCM digital outputs are relays with form “C” contacts (1 NO, 1 NC).
Contact ratings: 5A, 250 VAC; 5A, 30 VDC
EMT (external mechanical totalizer)
Contact ratings: 120mA, 240 VAC; 120mA, 24 VDC
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