10-1
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
10.1 Overview
This section describes how to wire the inputs and outputs for QTA DIN CIO transmitters. If you don’t
know your transmitter type, see Section 1.6.
It is the user’s responsibility to verify that the specific installation meets the local and national safety
requirements and electrical codes.
10.2 Channel Configuration
The six output terminals are divided into three pairs. The pairs are called Channels A, B, and C.
Channel A is terminals 21 and 22; Channel B is terminals 23 and 24; and Channel C is terminals 31
and 32. Variable assignments are governed by channel configuration.
Output wiring requirements depend on how you will configure the transmitter terminals. The
configuration options are shown in Table 10-1 and Figure 10-1. You can use ProLink II software to
configure the channels. See the transmitter configuration manual for more information.
If Channel B is configured as a frequency output or discrete output, it can also be configured to use
either internal or external power. Channel C can be configured to use either internal or external
power, independent of its output configuration.
•
“Internal power” means that the terminals are powered automatically by the transmitter. The
output wiring instructions do not include power setup and power wiring.
•
“External power” means that the terminals must be connected to an independent power
supply. The output wiring instructions include power setup and power wiring.
Note: The terms “active” and “passive” are sometimes used to describe internally and externally
powered outputs.
Note: You cannot configure the following combination: Channel B = discrete output,
Channel C = frequency output. If you need both a frequency output and a discrete output, use the
following: Channel B = frequency output, Channel C = discrete output. For more information, see the
transmitter configuration manual.
Note:
Table 10-1 Channel Configuration
Channel
Terminals
Configuration options
Power
A
21 & 22
mA output with HART/Bell 202
a
a. The Bell 202 signal is superimposed on the mA output.
Internal
B
23 & 24
• mA output (default)
Internal
• Frequency output
b
b. Can be configured for active high or active low polarity. Default is active high.
Internal or external
c
c. You must provide power to the outputs when a channel is set to external power.
• Discrete output
d
d. Because discrete output 1 uses the same circuitry as the frequency output, it is not possible to configure both
a frequency ouput and discrete output 1. If both a frequency output and a discrete output are required, configure
Channel B as the frequency output and Channel C as the discrete output (discrete output 2).
Internal or external
c
C
31 & 32
• Frequency output (default)
e
e. 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
c
• Discrete output
Internal or external
c
• Discrete input
Internal or external
c
D
33 & 34
Modbus/RS-485
Internal
