Mighty Module MM1200 User manual

DESCRIPTION
TheMM1200monitorsanythermocoupleinput
signal and trips a dpdt, 5 A relay when the
input exceeds the desired level. Normal
operationhastherelayenergizedforthenon-
alarmconditionandde-energizedforanalarm
condition. This provides a fail-safe alarm
conditionforlossof power tothemodule. The
alarm has a set of red/green LEDs to indicate
the alarm status.
Adeadbandadjustment allowsadeadbandof
0.5% to 100% of span to be set into the
module. The deadband is symmetrical about
the setpoint.
With the latching option, the alarm has no
deadband control. Once the limit has been
reached, the alarm latches and power must
bemomentarilyinterruptedtoreset the alarm.
Cold junction compensation is provided by a
solid state temperature sensor embedded in
the thermocouple terminal strip. The module
includes filtering and conditioning to reduce
susceptibility to transients and noisy
operations.
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).
OPTIONS
HHigh alarm: Alarm occurs on an
increasing signal.
LLow alarm: Alarm occurs on a
decreasing signal.
RThe Normal condition for the relay is
energized. Itde-energizesfor analarm
condition(Failsafe).OptionR(Reverse
Sense) reverses this logic.
UAll circuit boards conformal coated for
protection against moisture.
VRelaydriveroutput (12VDC unfiltered).
For use with 12 VDC relay coils having
220 ohms resistance. Also suitable for
use as open-collector output.
BStandard burnout protection is upscale
(high temperature). Option B provides
downscale (low temperature)
indication on thermocouple burnout.
MM1200
THERMOCOUPLE INPUT
LIMITALARMS
CALIBRATION
ThemoduleisshippedwithZEROandSPAN
precalibrated. The user needs only adjust
theSETPOINTandDEADBANDforthedesired
levels.
Known input must be provided for setpoint
adjustment and for calibration. If a
thermocouple simulator is available, use it to
providetheinput,connectingittothemodule
with the appropriate pair of thermocouple
wires. Otherwise, use copper wires to
connectaprecisionDC millivoltsourcetothe
input.
Whenamillivoltsourceandcopperwiresare
used it will be necessary to measure and
correct for the temperature at the module’s
input connection. Using standard tables for
your thermocouple, find the millivolt level
correspondingto thetemperatureattheinput
terminals. Then, at each calibration
temperature, subtract this voltage from the
voltage given by the thermocouple table.
Remember, calibration accuracy will be no
better than the accuracy of this temperature
measurement.
Connectthesignaltothemoduleinputandset
it for the desired trip point. Turn the
DEADBANDfullyccw. AdjusttheSETPOINT
control until the relay just trips.
AdjusttheDEADBANDforthedesiredamount
of deadband. Vary the signal up and down
tocheckthelevelatwhichtherelaytrips. The
setpoint will remain centered in the middle of
the deadband.
MOUNTING
Themoduleisdesignedtoplugintoastandard
11-pin relay socket. (MP011) is a molded
plasticsocket suitable for mounting on a flat
surface or snap into a 2 3/4 inch wide PVC
track (TRK48).
A hold-down assembly (CLP1) is available
for installation where vibration may be a
problem.
A DIN rail mounted socket (DMP011) is
available for 35mm symmetrical DIN rail.
AKillarkHK Seriesexplosion-proofhousing
with dome and 8-pin socket is available
(HKB-HK2D-11).
1 2

SPECIFICATIONS
INPUTRANGE
select any type thermocouple
(min span 5 mV)
SETPOINT
0 to 100% of span
DEADBAND
0.5% to 100% of span
ACCURACY
±0.1% of span
COMMONMODEREJECTION
120 dB, DC to 60 Hz
RELAY CONTACT (dpdt)
Resistive Load:
5 A max, 150 W max,
220 VAC max, 30 VDC max
Inductive Load:
(Power factor ³0.4):
2.5 A max, 75 W max,
220 VAC max, 30 VDC max
Linearity
(Option T) ±0.01% of span
OPERATINGTEMPERATURE
14°F to 140°F/-10°C to 60°C
TEMPERATURESTABILITY
±(0.02% of span + 1.3 micro V)/°C max
POWER (2.5 W max)
115 VAC ±10%, 50/60 Hz
230 VAC ±10%, 50/60 Hz
(DC Power Option)
24 VDC (limits 21 VDC to 28 VDC)
Isolation, DC power supply to input
common: 10 megohms
CASE DIMENSIONS INCHES [mm]
Specifications subject to change without notice. ©2007 Wilkerson Instrument Co., Inc. DWG#W102224D 3/15
V OPTION
(OPEN-COLLECTOR TRANSISTOR OUTPUT)
ForTTL
(open-collector)outputuse:
Pins 8 (+) and 6
Forrelaydriver
(switchedvoltage)outputuse:
Pins 7 (+) and 8
34