The EWTB 1000, EWTB 1000/C (Clock) and EWTB 1000/S (Serial) are microprocessor based digital instruments used for refrigerator and freezer control; they are designed specifically for “forced draft” units, either medium or low temperature.

• Housing: black ABS plastic, self-estinguishing
• Dimensions: front 211x178 mm (8.30x7.00”), depth 110 mm (3.14”)
• Mounting: wall-mounting
• Relay outputs: one (1) SPST relay 15(7)A 250V AC for compressor, one (1) SPDT relay 8(3)A 250V AC for defrost, four (4) SPST relays 8(3)A 250V AC for evaporator fan control, auxiliary functions, light and ON/OFF switch
• Remote alarm output: one (1) output 12 Vdc/50 mA to remote alarm buzzer or relay
• Analog inputs: two (2) PTC probes for temperature control and defrost termination
• Digital inputs: three (3) digital inputs for door switch, pressure switch and crankcase heater
• Serial connection: RS-485 port for connection to the TELEVIS system (EWTB 1000/S only)
• Televis system compatibility: software rel 2.0.5 or greater (EWTB 1000/S only)
• Resolution: 1 °C (°F)
• Accuracy: better than 0.5% of full scale
• Power supply (dep. on model): 220, 110, 24 Vac; 12 Vdc (only EWTB 1000)