• Provides Relay Contact Closures at Preset RTD Input
• 3-Wire or 2-Wire, 10 ohms to 2000 ohms RTDs
• Fail-Safe, Latching and Adjustable Deadband Available
• Red and Green LED Alarm Status Indicators
• Unlimited Choice of Input Ranges ( Within specified range limits )
• Upscale Burnout Protection
• Choice of Power Options
• 10 Year Warranty

The MM1420 monitors an RTD input signal and provides two sets of spdt, 5 A alarm relays with two independently adjustable setpoints. Each setpoint has a set of red/green LEDs to indicate alarm status. When the input is between the setpoints, the relays are normally deenergized. When the signal exceeds a particular setpoint, the relay becomes energized. To provide a fail-safe operation (loss of power resulting in an alarm state), select Option R. The module can be supplied as a HI/HI, HI/LO, or LO/LO alarm (HI/LO supplied if not specified).

Standard deadband on both alarms is fixed at 0.5% of span (Option A provides adjustable deadband of 0.5% to 100% of span.) Option D, latching alarms, has no deadband control. Once the limit has been reached, the alarm latches and power to the module must be momentarily interrupted to reset the alarm.

All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning.

TYPICAL APPLICATIONS
Temperature control, monitoring or warning for HVAC, pumps, motors, etc