GE HygroPro - 4.2 Electrical

Chapter 4: Specifications
Page 44 HygroPro User’s Manual
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
i
= 28V P
i
= 0.653W L
i
= 62µH
I
i
= 93.3mA C
i
= 0
RS485
U
i
= 3.72V P
i
= 212mW L
i
= 62µH
I
i
= 228mA C
i
= 67µF at 5.36V