6-1
Instruction and Operation Manual
X-CM-QmBS-eng
Part Number: 541B052AHG
June, 2008
Section 6 Wiring FM AN Transmitter
QmBS Sensor / QTA Transmitters
6.1 Overview
This section explains how to wire outputs for QTA field-mount AN transmitters. If you don’t know your
transmitter type, see Section 6.1.
It is the user’s responsibility to verify that the specific installation meets the local and national safety
requirements and electrical codes.
6.2 Output Terminals and Output Types
Table 6-1 describes the outputs and communication protocols available for the QTA field-mount AN
transmitter.
6.3 Output Wiring
Output wiring requirements depend on how you will use the analog functionality and the HART or
Modbus protocol. This section describes several possible configurations:
•
Figure 6-1 shows the wiring requirements for the mA output (terminals 1 and 2) and the
frequency output (terminals 3 and 4).
•
Figure 6-2 shows the wiring requirements for the mA output (terminals 1 and 2) if it will be
used for HART communications in addition to the mA signal.
•
Figure 6-3 shows the wiring requirements for RS-485 communications using the RS-485
output (terminals 5 and 6).
•
Figure 6-4 shows the wiring requirements for connecting the transmitter to a HART multidrop
network.
Table 5-1 Terminals and Output Types
Terminals
Output type
Communication
1 & 2
Milliamp/Bell 202
a
a. The Bell 202 signal is superimposed on the mA output.
HART
3 & 4
Frequency
None
5 & 6
RS-485
• Modbus (default)
• HART
