Instruction and Operation Manual
X-CM-QmBS-eng
Part Number: 541B052AHG
June, 2008
Section 7 I/O Wiring FM CIO Transmitter
QmBS Sensor / QTA Transmitters
7-2
Figure 7-1 Configuration of Configurable I/O Terminals
7.3 mA Output Wiring
The following 4–20 mA wiring diagrams are examples of proper basic wiring for the QTA FM CIO
transmitter’s primary and secondary mA outputs. The following options are shown:
•
Basic mA wiring (Figure 7-2)
•
HART/analog single-loop wiring (Figure 7-3)
•
HART multidrop wiring (Figure 7-4)
Table 7-1 Channel Configuration
Channel
Terminals
Configuration options
Power
A
1 & 2
mA output with HART/Bell 202
a
a. The Bell 202 signal is superimposed on the mA output.
Internal
B
3 & 4
• mA output (default)
Internal
• Frequency output
Internal or external
b
b. You must provide power to the outputs when a channel is set to external power.
• Discrete output
Internal or external
C
5 & 6
• Frequency output (default)
c
c. When configured for two frequency outputs (dual pulse), frequency output 2 is generated from the same signal
that is sent to the first frequency output. Frequency output 2 is electrically isolated but not independent.
Internal or external
• Discrete output
Internal or external
• Discrete input
Internal or external
Terminals 1 and 2 (Channel A)
mA1 output
Internal power only
HART (Bell 202) communications
Terminals 3 and 4 (Channel B)
mA2 output
OR
FO
OR
DO1
Power:
• mA – internal only
• FO or DO – internal or external
No communications
Terminals 5 and 6 (Channel C)
FO
OR
DO2
OR
DI
Power: internal or external
No communications
mA = milliamp
FO = frequency output
DO = discrete output
DI = discrete input
+
–
+
–
+
–
