Honeywell

UDC2800

UDC Series • Industrial Controller

Type Industrial

Application Process Control

Probe Inputs 2

Relay Outputs 4

Communication RS485 Modbus / Ethernet (option)

Panel Size 1/4 DIN (96x96) mm

R1 Control 1

R2 Control 2

R3 Alarm 1

R4 Alarm 2

Universal digital controller, replacement for UDC2500/3200

Technical Specifications

Display Type	LCD
Display Digits	5
Buttons	6
LED Indicators	Output 1, Output 2, Alarm 1, Alarm 2, Auto

Relay Outputs	4
Relay Rating	3A/250VAC

Operating Temp	0 to 55°C
Storage Temp	-40 to 70°C

Terminal	Function	Type	Wire Color
L/N	Power AC	Input	brown/blue
IN1+/IN1-	Input 1	Input	per sensor
IN2+/IN2-	Input 2	Input	per sensor
OUT1	Control Output 1	Output	relay
OUT2	Control Output 2	Output	relay/mA
ALM1	Alarm 1	Output	red
ALM2	Alarm 2	Output	red
RETX	Retransmit 4-20mA	Output	purple
A/B	RS485 Modbus	Comm	yellow/green

Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.

Code	Parameter	Range	Default	Description
SP1	Setpoint 1	Per input range	100 °C	Primary setpoint
SP2	Setpoint 2	Per input range	50 °C	Secondary setpoint
Pb	Prop Band	0.1 to 999.9	5 °C/%	Proportional band
Ti	Integral Time	0 to 9999	120 sec	Reset time
Td	Derivative Time	0 to 9999	30 sec	Rate time
AT	Auto-Tune	0=Off, 1=On	0	Start auto-tuning
AL1	Alarm 1 SP	Per input range	150 °C	Alarm 1 setpoint
AL2	Alarm 2 SP	Per input range	0 °C	Alarm 2 setpoint
RMP	Ramp Rate	0 to 999	0 °C/min	Setpoint ramp rate