Installation 1-7
September 2004
Wiring Std 0/4-20 mA
Analog Outputs
The Model AT868 flow transmitter has one isolated 0/4-20 mA
analog output per channel (designated as Output A and C). These
outputs can be configured independently. Typically, Output A is used
for Channel 1 and Output C is used for Channel 2; however, analog
outputs can be configured to measure either channel.
Connections to this output may be made with standard twisted-pair
wiring, but the current loop impedance for these circuits must not
exceed 600 ohms.
To wire the analog outputs, complete the following steps:
1. Follow the instructions on page 1-4 to prepare the unit before you
connect power.
2. Refer to Figure 1-4 on page 1-14 for the locations of the
appropriate terminal blocks and wire the analog outputs as shown.
Secure the cable clamp.
Note: Analog outputs 1 and 2 in the wiring diagram correspond to
analog outputs A and C in the AT868 software.
!ATTENTION EUROPEAN CUSTOMERS!
To meet CE Mark requirements, all cables must be installed
as described in Appendix B, CE Mark Compliance.
3. Do one of the following:
• Proceed to the next section to continue wiring the Model AT868
flow transmitter.
• Reinstall the plastic shroud, replace the front cover on the
enclosure and tighten the screws.
Note: Prior to use, the analog output must be set up and calibrated.
See Chapter 4, Calibration, for detailed instructions.
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