Electrical - GE HygroPro User Manual

Chapter 4: Specifications

4.2 Electrical

Power
•
Input: 12 to 30 VDC (loop-powered, customer supplied)
•
Output: 4 to 20 mA analog, RS485 digital
•
Output Resolution: 0.01 mA/12 bits
Maximum Load Resistance:  = (PSV x 33.33) – 300,
•
where PSV = Power Supply Voltage
Example: Given a 24 VDC Power Supply,
Max. Load Resistance   33.33) – 300 = 500 
•
Cable: 6 ft (2 m), standard (consult GE for custom lengths)
Input Parameters for Loop-Powered Intrinsic Safety
U = 28V
i
I = 93.3mA
i
U = 3.72V
i
I = 228mA
i
Page 44
P = 0.653W
i
C = 0
i
RS485
P = 212mW
i
C = 67µF at 5.36V
i
L = 62µH
i
L = 62µH
i
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