Emerson/Alco

ECD-002

ECD Series • Refrigeration Controller

Type Refrigeration

Application Display Case

Probe Inputs 2

Relay Outputs 2

Communication RS485 Modbus RTU

Panel Size 32x74 mm

R1 Compressor

R2 Defrost

Display case controller with night setback feature

Technical Specifications

Relay Outputs	2
Relay Rating	8A/250VAC

Operating Temp	-5 to 50°C
Storage Temp	-20 to 60°C

Terminal	Function	Type	Wire Color
1	Power L	Input	brown
2	Power N	Input	blue
3-4	Probe 1	Input	yellow/white
5-6	Probe 2	Input	green/white
7	Night Mode DI	Input	gray
8	DI Common	Input	black
9-10	RS485	Comm	orange/yellow
11-12	Compressor	Output	black
13-14	Defrost	Output	red

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

Code	Parameter	Range	Default	Description
SP	Day Setpoint	-50 to 50	4 °C	Day mode temperature
SP2	Night Setpoint	-50 to 50	2 °C	Night mode temperature
dF	Differential	0.5 to 10	2 °C	Switching differential
dI	Defrost Interval	0 to 48	8 hr	Defrost interval
dL	Defrost Duration	0 to 120	30 min	Max defrost time
nS	Night Start	00:00-23:59	22:00 hh:mm	Night mode start
nE	Night End	00:00-23:59	06:00 hh:mm	Night mode end