Analytical Industries GPR-2500 S Oxygen Analyzer - Manual (Page 13)

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18,500 ft. – 16 AWG
29,500 ft. – 14 AWG
Connections – Optional Intrinsic Safety Barrier:
Non-hazardous area: Barrier terminals (1), (2)
Hazardous area: Barrier terminals (3), (4)
Direct measurement of 4-20mA: Reference (C1), connect the current measuring device at terminal (2) of the
barrier and the negative (-) terminal from the power source as shown below.
Convert 4-20mA current to voltage: Reference (C2), connect a resistor (RL) maximum value 850Ω between
terminal (2) of the barrier and the negative (-) terminal from the power source and measure the voltage across the
resistor.
Example: To convert the 4-20mA current for output to a PLC requiring 1-5V, follow the above procedure using a
250Ω resistor (RL).
Hazardous Area Operation: