Honeywell UDC2800 User Manual

Step What to do How to do it
controller is configured
for Current output and
the proper range (4 to
20 or 0 to 20) is
configured.
Make the Output set up group function prompt CO
Range = 4–20 or 0–20 per your application.
See Output Set Up Group for more information.
2 Check the field wiring. Output impedance must be less than or equal to
1000 ohms.
3 Check the output. Put the controller into Manual mode and change
the output from 0 % to 100 % (4-20 mA). Use a DC
milliammeter at the rear terminals to verify the
output.
4 Recalibrate the Current
Proportional output.
See Output Calibration for more information.
5 Change Current Output
board.
Installation instructions provided with new board.
6 Change Controller
Procedure #3
This table explains how to troubleshoot Time Proportional Output
failure.
Table 8-7: Troubleshooting Time Proportional Output Failure
Step What to do How to do it
1 Make sure the controller
is configured for Time
Proportional output.
Make Output set up group function prompt Output
Algorithm = Time Simplex or Time Duplex.
See Configuration for more information.
2 Check the field wiring. Make sure the NO or NC contact wiring is correct.
See Installation for more information.
3 Check the output. Put the controller into Manual mode. Vary the
output above and below the present value. Observe
OUT1 indicator on the operator interface. Contact
should change state. 0 % open, 100% closed.
Listen for a click from the relay when the OUT1
indicator changes state.
266
Chapter 8 - Troubleshooting/Service

Honeywell UDC2800 Specifications

General

Control Modes	PID, ON/OFF, Manual
Mounting	Panel Mount
Display	Dual 4-digit LED
Input Types	Thermocouple, RTD, mA, mV, V
Output Types	Relay
Power Supply	100-240 VAC, 50/60 Hz
Communication	RS-485 Modbus RTU
Enclosure Rating	NEMA 4X