Emerson/Alco

EXD-U00

EXD Series • Refrigeration Controller

Type Refrigeration

Application EEV Control

Probe Inputs 2

Relay Outputs 1

Communication RS485 Modbus RTU

Panel Size DIN rail mm

R1 Alarm

Universal electronic expansion valve driver for Alco EX valves

Technical Specifications

Relay Outputs	1
Relay Rating	5A/250VAC

Operating Temp	-25 to 55°C
Storage Temp	-40 to 70°C

Terminal	Function	Type	Wire Color
1	Power 24V	Input	red
2	Power GND	Input	black
3-4	Suction Temp NTC	Input	yellow/white
5-6	Suction Press 4-20mA	Input	red/black
7	RS485 A+	Comm	orange
8	RS485 B-	Comm	yellow
9	RS485 GND	Comm	black
10-11	Alarm Relay	Output	gray
A	EEV Motor A	Output	brown
B	EEV Motor B	Output	white
C	EEV Motor C	Output	blue
D	EEV Motor D	Output	red

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

Code	Parameter	Range	Default	Description
SH	Superheat SP	2 to 25	8 K	Target superheat
Kp	P-gain	0.5 to 10	3	Proportional gain
Ki	I-time	30 to 600	180 sec	Integral time
Kd	D-time	0 to 60	15 sec	Derivative time
MO	Min Opening	0 to 50	10 %	Minimum valve position
MA	Max Opening	50 to 100	100 %	Maximum valve position
RF	Refrigerant	0-15	1	Refrigerant type for P-T calc