Wiring Analog Outputs - GE PanaFlow HT User Manual

2.5.2 Wiring Analog Outputs

The standard configuration of the PanaFlow HT flow transmitter includes one isolated 4-20 mA analog output with
HART. Connections to these outputs may be made with standard twisted-pair wiring, but the current loop impedance
for these circuits must not exceed 600 ohms. A second analog output is available as an option.
To wire the analog outputs, complete the following steps:
1. Disconnect the main power to the unit and remove the wiring cover.
2. Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3. Refer to Figure 10 on page 11 for the location of the terminal block and wire the analog output as shown. Secure
the cable clamp.
To meet CE Mark requirements, all cables must be installed as described in
Note:
Analog Output A carries a HART signal. Whenever this becomes an open circuit or the load exceeds
specifications, the output will go to 0 mA and the HART signal will be lost. This can happen if one disconnects
the HART communicator while the circuit is live (hot swap). To restore HART communication, one must reset
the unit. This can be done by power cycling the instrument, or by entering Configure mode and then exiting
without making a change. (Select No at the "Save Changes?" prompt.)
Analog Output A carries an active HART signal. Do not supply a 24 V supply to this circuit. The circuit is
powered by the flowmeter.
4. If wiring of the unit has been completed, reinstall the wiring cover on the enclosure and tighten the set screw.
WARNING! Make sure all covers, with their o-ring seals, are installed and the set screws tightened before
applying power in a hazardous environment.
Note: Prior to use, the analog output must be set up and calibrated. Proceed to the next section to continue the initial
wiring of the unit.
Note: Upon applying power to the instrument, the analog outputs will go to 24 mA before settling on a measurement
value. This initial state of 24 mA is intended to signal to the Operator that the instrument is powered up and
executing the initial self-test routines. The 24 mA state normally lasts only for a few seconds until we start
measuring flow.
Note: See Appendix A, Specifications, for the load and voltage requirements.
PanaFlow HT User's Manual
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Appendix G, CE Mark Compliance.
Chapter 2. Installation
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