Full Gauge

TC-940Ri

TC-940 Series • Refrigeration Controller

Type Refrigeration

Application Cold Room

Probe Inputs 2

Relay Outputs 3

Communication RS485 (optional)

Panel Size 32x74 mm

R1 Compressor

R2 Defrost

R3 Fan

Refrigeration controller with defrost management

Technical Specifications

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

Relay Outputs	3
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+	Probe 1 +	Input	red
S1-	Probe 1 -	Input	white
S2+	Probe 2 +	Input	red
S2-	Probe 2 -	Input	white
DI	Digital Input	Input	gray
GND	DI Common	Input	gray
R1	Relay 1 (Comp)	Output	black
C1	Relay 1 COM	Output	black
R2	Relay 2 (Def)	Output	orange
C2	Relay 2 COM	Output	orange
R3	Relay 3 (Fan)	Output	green
C3	Relay 3 COM	Output	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	0 °C	Temperature setpoint
Hys	Hysteresis	0.1 to 30	2 °C	Differential
Ls	Low Limit	-50 to Set	-30 °C	Min setpoint
Us	High Limit	Set to 105	50 °C	Max setpoint
Of1	Probe 1 Offset	-10 to 10	0 °C	Room probe cal
Of2	Probe 2 Offset	-10 to 10	0 °C	Evap probe cal
Cd	Comp Delay	0 to 30	0 min	Startup delay
Co	Min Off Time	0 to 30	3 min	Minimum off
dF	Defrost Type	0=Off, 1=Elec, 2=Gas	1	Defrost method
dt	Defrost Duration	0 to 255	30 min	Max duration
dI	Defrost Interval	0 to 24	8 hr	Time between
St	Defrost End Temp	0 to 50	8 °C	Termination temp
dd	Drip Time	0 to 30	2 min	Drain time
Fd	Fan Delay	0 to 30	0 min	Fan restart delay
Fc	Fan Cutout	0=No, 1=Yes	1	Stop fan in defrost
AL	Low Alarm	-50 to Set	-10 °C	Low alarm setpoint
AH	High Alarm	Set to 105	15 °C	High alarm setpoint
Ad	Alarm Delay	0 to 255	60 min	Alarm delay