• Provides a DPDT Relay Contact Closure at a Preset RTD Input
• 3-Wire or 2-Wire, 10 ohms to 2000 ohms RTDs
• Standard Fail-Safe Operation
• Red and Green LED Alarm Status Indicators
• Adjustable Deadband
• Latching Alarm Available (MM1410)
• Unlimited Choice of Input Ranges ( Within specified range limits )
• Choice of Power Options
• 10 Year Warranty

The MM1400 monitors an RTD input signal and trips a dpdt, 5 A relay when the input exceeds the desired level. Normal operation has the relay energized for the non-alarm condition and  deenergized for an alarm condition. This provides a fail-safe alarm condition for loss of power to the module. The alarm has a set of red/green LEDs to indicate alarm status.

For the MM1400, a deadband adjustment allows a deadband of 0.5% to 100% of span to be set into the module. The deadband is symmetrical about the setpoint.

With the latching alarm option, the alarm has no deadband control. Once the limit has been reached, the alarm latches and power 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.

RTD INPUT 3-Wire or 2-Wire, 10 ohms to 2000 ohms INPUT RANGE select any range within RTD limit [min span 25°F/14°C (100°F/55°C with 10 ohms RTD)] EXCITATION CURRENT RTD Current 10 ohms 100 ohms 1000 ohms 2000 ohms 10 mA 5 mA 0.5 mA 0.2 mA SETPOINT 0 to 100% of span DEADBAND 0.5% to 100% of span OPEN SENSOR OUTPUT > full scale ACCURACY ±0.1% of span or 0.02 ohms, whichever is greater

COMMON MODE REJECTION 120 dB, DC to 60 Hz RELAY CONTACTS (dpdt) Resistive Load 5 A max, 150 W max, 220 VAC max, 30 VDC max Inductive Load (Power Factor > 0.4) 2.5 A max, 75 W max, 220 VAC max, 30 VDC max TRANSISTOR OUTPUT (Option V) relay driver (12V coil, >220 ohms) or open-collector outputs sink 100 mA, 30 V supply max OPERATING TEMPERATURE 14°F to 140°F/–10°C to 60°C TEMPERATURE STABILITY ±0.02% of span or 0.025°C/°C, whichever is greater POWER 115 VAC ±10%, 50/60 Hz (2.5 W max) 230 VAC ±10%, 50/60 Hz (2.5 W max) (DC Power Option) 24 VDC (limits 21-32 VDC) 12 VDC (limits 10-16 VDC) Isolation, DC power supply to input common: 10 megohms

11 Pin Header (Option E)		20 Pin Header
PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 PIN 9 PIN 10 PIN 11	Power AC L1 or DC + RTD Compensating Lead Power AC L2 or DC - RTD RTD Relay Set 1 NO Relay Set 1 C Relay Set 1 NC Relay Set 2 NO Relay Set 2 C Relay Set 2 NC	PIN 1 PIN 3 PIN 9 PIN 11 PIN 13 PIN 14 PIN 15 PIN 17 PIN 18 PIN 19 PIN 20	Power AC L1 or DC + Power AC L2 or DC - RTD RTD Relay Set 1 NO Relay Set 1 C Relay Set 1 NC Relay Set 2 NO Relay Set 2 C Relay Set 2 NC RTD Compensating Lead