WILKERSON INSTRUMENT CO., INC.

MM1220 Thermocouple Input Plug-In
Dual Alarm Mighty Module

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MM1220

MM1220
Thermocouple Input
Plug-In
Dual Alarm
Mighty Module

$395.00

The following information must be entered to complete your order:
See "Specifications" below for Input range limits.

Power:

Input:
Zero Scale
Full Scale
Units
  Thermocouple Type
Alarms: Alarm Action
  Alarm Logic

Quantity:

 

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Specifications
 
  • Features
  • Description
  • Specifications
  • Dimensions
  • Connections
  • Provides Relay Contact Closures at Preset Thermocouple Input
  • Cold Junction Compensated
  • Fail-Safe, Latching, and Adjustable Deadband Available
  • Red and Green LED Alarm Status Indicators
  • 5 mV Minimum Input Span
  • Unlimited Choice of Input Ranges ( Within specified range limits)
  • Upscale Burnout Protection (Downscale Available)
  • Choice of Power Options
  • 10 Year Warranty

The MM1220 monitors any thermocouple 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 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.

Cold junction compensation is provided by a solid state temperature sensor embedded in the thermocouple terminal strip.

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

Upscale burnout protection is provided as standard. In the event the thermocouple opens, the module behaves as though the input goes offscale high. Option B provides downscale burnout protection (module behaves as though the input goes low).

TYPICAL APPLICATIONS
Heater/cooler control, HI/LO temperature alarm.

INPUT RANGE
select any type thermocouple (min span 5 mV)

SETPOINT
0 to 100% of span

DEADBAND
Standard fixed 0.5% of span
(Option A) 0.5% to 100% of span

(Option D) Latching, Interrupt power to reset

RELAY CONTACTS (spdt)
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 (12 V coil, >220 ohms) or open-collector outputs
sink 100 mA, 30 V supply max

ACCURACY
±0.1% of span

COMMON MODE REJECTION
120 dB, DC to 60 Hz

OPERATING TEMPERATURE
14°F to 140°F/–10°C to 60°C

TEMPERATURE STABILITY
±(0.02% of span + 1.3 μV)/°C max

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

 

Thermocouple Input Mighty Module Dimension Drawing

T/C Input +
T/C Input +
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
PIN 6
PIN 7
PIN 8
PIN 9
PIN 10
PIN 11
T/C Terminal+
T/C Terminal -
Power AC L1 or DC +
No Connection
Power AC L2 or DC -
No Connection
No Connection
Relay Set 1 NO
Relay Set 1 C
Relay Set 1 NC
Relay Set 2 NO
Relay Set 2 C
Relay Set 2 NC
Specifications    Manual

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