Full Gauge

TC-900Ri

TC-900 Series • Refrigeration Controller

Type Refrigeration

Application Display Case

Probe Inputs 1

Relay Outputs 1

Communication RS485

Panel Size 28.5x71 mm

R1 Compressor

Basic controller with RS485 Modbus communication for centralized monitoring

Technical Specifications

Relay Outputs	1
Relay Rating	10A/250VAC

Operating Temp	-10 to 50°C
Storage Temp	-20 to 60°C

Terminal	Function	Type	Wire Color
L	Power L	Input	brown
N	Power N	Input	blue
S1	Sensor +	Input	red
S2	Sensor -	Input	white
NO	Relay NO	Output	black
C	Relay COM	Output	black
A+	RS485 A+	Comm	yellow
B-	RS485 B-	Comm	green

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

Code	Parameter	Range	Default	Description
Set	Setpoint	-50 to 105	5 °C	Temperature setpoint
Hys	Hysteresis	0.1 to 30	2 °C	Switching differential
Ls	Low Limit	-50 to Set	-40 °C	Minimum setpoint
Us	High Limit	Set to 105	99 °C	Maximum setpoint
Ofs	Offset	-10 to 10	0 °C	Probe calibration
Cd	Comp Delay	0 to 30	0 min	Compressor restart delay
Add	Modbus Address	1 to 247	1	Network address
bAu	Baud Rate	0=9600, 1=19200	0	Communication speed