LAE

LTR-5CSRE-AG

LTR Series • Refrigeration Controller

Type Refrigeration

Application Cold Room

Probe Inputs 3

Relay Outputs 4

Communication RS485 Modbus RTU

Panel Size 32x74 mm

R1 Compressor

R2 Defrost

R3 Fan

R4 Alarm

Advanced refrigeration controller with RS485 Modbus communication

Technical Specifications

Display Type	LED
Display Digits	3
Buttons	4
LED Indicators	Compressor, Defrost, Fan, Alarm, Comm

Relay Outputs	4
Relay Rating	8A/250VAC (Comp 16A)

Operating Temp	-10 to 55°C
Storage Temp	-25 to 65°C

Terminal	Function	Type	Wire Color
1	Power L	Input	brown
2	Power N	Input	blue
3	Probe 1	Input	yellow
4	Probe 1	Input	white
5	Probe 2	Input	green
6	Probe 2	Input	white
7	Probe 3	Input	orange
8	Probe 3	Input	white
9	RS485 A+	Comm	orange
10	RS485 B-	Comm	yellow
11	Comp COM	Output	black
12	Comp NO	Output	black
13	Defrost COM	Output	red
14	Defrost NO	Output	red
15	Fan COM	Output	blue
16	Fan NO	Output	blue
17	Alarm COM	Output	gray
18	Alarm NO	Output	gray

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

Code	Parameter	Range	Default	Description
SP	Setpoint	-50 to 99	-18 °C	Temperature setpoint
HY	Differential	0.1 to 20	2 °C	Switching differential
dT	Defrost Type	0=Off,1=Elec,2=Gas	1	Defrost method
dI	Defrost Interval	0 to 99	8 hr	Defrost interval
dL	Defrost Duration	0 to 255	30 min	Max defrost time
dE	Defrost End	-50 to 50	8 °C	End defrost temperature
Fd	Fan Delay	0 to 30	3 min	Fan delay after defrost
FA	Fan Mode	0-3	1	Fan operation mode
Ad	Address	1 to 247	1	Modbus address
bd	Baud Rate	0=9600,1=19200	0	Communication speed