The EZ-ZONE® ST integrated solid state controller from Watlow®

• Temperature stability: ±0.1°F/°F (±0.1°C/°C) rise in ambient max.

Agency Approvals

• UL®, CSA, CE (zero cross models only), RoHS, W.E.E.E.

• Limit version features FM approval

Controller

• Microprocessor based user-selectable control modes

• PID module: single universal input, 2 outputs

• Limit module: single universal input, 2 outputs

• Two total additional digital input/outputs shared between PID

and limit functions

• Control sampling rates: input = 10Hz, outputs = 10Hz

• Isolated EIA 485 Modbus® RTU serial communications

Wiring Termination—Touch Safe Terminals

• Input, power and controller output terminals touch safe

removable 12 to 22 AWG

• Power load terminals 6 to 12 AWG

• Tightening torque: 30 in.-lbs

Universal Input

• Thermocouple, grounded or ungrounded sensors

• >20M input impedance

• Max. of 20 source resistance

• RTD 2- or 3-wire, platinum, 100 and 1000 @ 0°C calibration to

DIN curve (0.00385//°C)

• Process, 0-20mA @ 100, or 0-10VDC @ 20k input impedance;

scalable, 0-50mV

• Inverse scaling

Digital Input

• Update rate: 1Hz

• Dry contact or dc voltage

DC voltage

• Max. input: 36V at 3mA

• Min. high state: 3V at 0.25mA

• Max. low state: 2V

Dry contact

• Max. short circuit: 13mA

• Min. open resistance: 500

• Max. closed resistance: 100