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6 I/O wiring for Model 2500
transmitters
Topics covered in this chapter:
•
mA/HART wiring
•
Frequency output wiring
•
Discrete output wiring
•
Discrete input wiring
6.1 mA/HART wiring
6.1.1 Basic analog wiring
Model 2500 basic analog wiringFigure 6-1:
A B
A. Channel A – Terminals 21 and 22 to mA receiving device; 820 Ω maximum loop resistance
B. Channel B – Terminals 23 and 24 to mA receiving device; 420 Ω maximum loop resistance
6.1.2
HART/analog single loop wiring
Note
For HART communications:
•
600 Ω maximum loop resistance
•
250 Ω minimum loop resistance
I/O wiring for Model 2500 transmitters
Installation Manual 37