10-3
Instruction and Operation Manual
X-CM-QmBS-eng
Part Number: 541B052AHG
June, 2008
Section 10 I/O Wiring DIN CIO Transmitter
QmBS Sensor / QTA Transmitters
Figure 10-2 Basic mA Output Wiring
Figure 10-3 HART/Analog Single-loop Wiring
820
Ω
maximum
loop resistance
mA1 output
mA2 output
420
Ω
maximum loop
resistance
+
+
–
–
HART-compatible
host or controller
+
–
820
Ω
maximum loop resistance
For HART communications:
• 600
Ω
maximum loop resistance
• 250
Ω
minimum loop resistance
