Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm

Mighty Module MM1420 RTD Input Dual Limit Alarm


MM1420 RTD Input Dual Limit Alarm

Mighty,Module,MM1420,RTD,Input,Dual,Limit,AlarmDescription

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 de-energized.  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 RR.  The module can be supplied as a HI/HI, HI/LO, or LO/LO alarm (HI/LO supplied if not specified).

Standard deadband 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.

The module includes filtering and conditioning to reduce susceptibility to transients and noisy operations.

Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm Download MM1420 Brochure

Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm Download MM1420 Manual

Features

Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
Provides Relay Contact Closures at a Preset RTD Input
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
3-Wire or 2-Wire, 10 ohms to 2000 ohms RTDs
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
Fail-safe, Latching and Adjustable Deadband Available
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
Red and Green LED Alarm Status Indicators
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
Unlimited* Choice of Input Ranges
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
Upscale Burnout Protection
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
Choice of Power Options
Mighty,Module,MM1420,RTD,Input,Dual,Limit,Alarm
10 + 5 Year Warranty

Typical Applications

Temperature control, monitoring or warning for HVAC, pumps, motors, etc.

Mounting

The module is designed to plug into a standard 20-pin relay socket (part number MP020). Option E uses an 11-pin socket (part number MP011).  The sockets are molded plastic suitable for mounting on a flat surface. The MP011 will mount in a 2 3/4 inch wide PVC snap track (TRK48). Use CLP-1 hold-down clip with MM1420 Option E (11-pin).  No clip is available for 20-pin Module. Killark HK Series explosion-proof housings are available with 11-pin sockets.  (They cannot be provided with 20-pin sockets.) Order HKB-HK2D-11 (standard dome) for use with MM1420 Option E.  An 11-pin DIN rail mounted socket (P/N DMP011) is available for 35mm symmetrical rail.

Specifications

RTD INPUT
3-wire or 2-wire,
10 ohms to 2000 ohms

INPUT RANGE
select any range within RTD limit
  min span 25F/14C
  (100F/55C with 10 ohms RTD)

Excitation Current

10 ohms
100 ohms
1000 ohms
2000 ohms
10 mA
5 mA
0.5 mA
0.2 mA

SETPOINT
Each alarm
 
0 to 100% of span

DEADBAND
Standard
 
Fixed 0.5% of span

(Option A)
  0.5% to 100% of span

RESPONSE TIME
20 ms typical
WR < = 200 ms
  (range dependent)

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
2 (spdt)
Resistive Load:
  5 A max, 150 W max
  220 VAC max, 30 VDC max

Inductive Load
  1/8 HP max at 120/240 VAC

TRANSISTOR OUTPUT (Option V)
Relay driver
  (12 V coil, > = 220 ohms)
or open-collector outputs
  sink 100 mA, 30 V supply max

LINEARITY (Option T)
0.01% of span

OPERATING TEMPERATURE
 14F to 140F
-10C to  60C

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)
  Isolation, DC power supply to input common
    10 megohms

 

* Within specified range limits


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