Honeywell UDC2800 User Manual

Function
Prompt
Selections or
Range of
Setting
Parameter Definition
No Burnout If Input 2 is being used in the Control Algorithm
(such as the PV or RSP input parameter), then the
pre-configured Failsafe output (selected in the
Control set up group) is applied when a failed input
is detected (does not apply for an input out of
range). Diagnostic message IN2 FAIL is
intermittently flashed on the lower display.
Upscale
Burnout
It will force the Input 2 signal to the full scale value
when the sensor fails. Diagnostic message IN2 FAIL
intermittently flashed on the lower display.
The controller remains in Automatic control mode
and adjusts the controller output signal in response
to the full scale Input 2 signal developed by the
Burnout circuitry.
Downscale
Burnout
It will force the Input 2 signal to the lower range
value when the sensor fails. Diagnostic message
IN2 FAIL intermittently flashed on the lower
display.
The controller remains in Automatic control mode
and adjusts the controller output signal in
response to the lower range Input 2 signal
developed by the Burnout circuitry.
No Failsafe This selection does not provide input failure
detection and should only be used when a
thermocouple input is connected to another
instrument which supplies the Burnout current.
(For this selection, no burnout signal is sent to the
sensor.)
ATTENTION: For Burnout to function properly
on a 0-20 mA input type (or a 0-5V type that
uses a dropping resistor), the dropping
resistor must be remotely located (across the
transmitter terminals). Otherwise, the input
at the instrument terminals will always be 0
mA (i.e., within the normal operating range)
when the 0-20 mA line is opened.
125
Chapter 4 - Configuration

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