Full Gauge

MT-512E 2HP

MT-512 Series • Refrigeration Controller

Type Refrigeration

Application Freezer

Probe Inputs 2

Relay Outputs 2

Panel Size 32x74 mm

R1 Compressor

R2 Defrost

Commercial freezer controller with 2HP relay capacity

Technical Specifications

Relay Outputs	2
Relay Rating	15A/250VAC (2HP)

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 (Room)	Input	red/white
S2	Probe 2 (Evap)	Input	red/white
R1	Relay 1 (Comp)	Output	black
C1	Relay 1 COM	Output	black
R2	Relay 2 (Def)	Output	orange
C2	Relay 2 COM	Output	orange

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	-18 °C	Temperature setpoint
Hys	Hysteresis	0.1 to 30	3 °C	Differential
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	5 min	Restart delay
dF	Defrost Type	0=Off, 1=Elec	1	Defrost method
dt	Defrost Duration	0 to 255	30 min	Max duration
dI	Defrost Interval	0 to 24	6 hr	Time between
St	Defrost End Temp	0 to 50	5 °C	Termination temp