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2.3.2 Internal / External Terminal Resistor Switch
The GT200-HT-MT has an internal series (270Ω/2W) resistor required for HART channel, supporting up to 13
HART instruments to be connected.
When the power of the series resistor is more than 2W, you must use an external series resistor (250Ω/3W),
supporting up to 15 HART instruments to be connected.
Switch to ON to use the internal series
resistor
Switch to OFF to use the external
series resistor
2.4 Interface
2.4.1 Power Interface
GND
NC
24V+
1
2
3
Pin
Function
1
Power ground
2
-
3
+24V DC