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Conditioning & Process Control Instrumentation Products
MM4130
THERMOCOUPLE INPUT
ISOLATED TRANSMITTER
FEATURES
Provides a Fully Isolated DC Output Proportional to any Thermocouple Input
Cold Junction Compensated
4 mV Minimum Input Span
Unlimited* Choice of Input/Output Ranges
Upscale Burnout Protection (Downscale Available)
Choice of Power Options
10 + 5 Year Warranty
DESCRIPTION
The MM4130 provides a DC output voltage or current, fully isolated from input,
line power and ground, proportional to a thermocouple input signal. It is useful
in measuring temperatures with any type of thermocouple. Cold junction
compensation is provided by a solid state temperature sensor embedded in the
thermocouple terminal strip. The module also includes filtering and conditioning
to reduce susceptibility to transients and noisy operations.
The module utilizes a feedback VCO to develop a pulse train with a duty cycle
proportional to the input signal amplitude. This pulse train is coupled through
a pulse transformer to the output circuitry where the duty cycle data is
converted to a proportional DC level in the output circuit. The isolated output
eliminates ground loops, large common mode signals and other types of
interference.
Upscale burnout protection is provided as standard. In the event the
thermocouple opens, the transmitter output will go off scale high. Option B
provides downscale burnout protection (transmitter output goes low).
TYPICAL APPLICATIONS
Eliminates ground loops and common mode signals for temperature monitoring,
control, and data acquisition.
MOUNTING
The module is designed to plug into a standard 8-pin relay socket. Part number
MP008 is a molded plastic socket suitable for mounting on a flat surface or in a
2 3/4 inch wide PVC snap track (TRK48). Use CLP-1 hold-down clip, if
needed. A Killark HK Series explosion-proof housing with dome and 8-pin socket
is available (HKB-HK2D-8). A DIN rail mounted socket (DMP008) is available
for 35mm symmetrical DIN rail.
SPECIFICATIONS
INPUT RANGE select any type TC
(min span 4
mV)
OUTPUT RANGE Voltage
select any range
from -10 V to +15V
10
mA max load
(min span 0.2 V)
Current
select any
range from 0 to 50 mA max
(min span 1 mA)
24 V compliance**
18 V compliance if full scale output >20
mA
OUTPUT RIPPLE
<0.1% of span
(peak to peak)
ACCURACY ±0.1% of
span at
endpoints
LINEARITY
Output/Input
+/-0.05% of span
(non-linearized)
COMMON MODE REJECTION
120 dB, DC to 60 Hz
ISOLATION
Output/Input
>500 megohms
Breakdown
Voltage
>1000 VAC rms
BREAKDOWN, P0WER/CIRCUITRY
>1500 VAC rms
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)
(2.5 W max)
Isolation
DC power supply to
input common:
10 megohms
*
Within specified range limits
** Compliance: The sum of all
voltage drops in the output loop cannot exceed 24V at rated current (1200 ohms 20
mA).
CONNECTIONS
Power AC L1 or DC +
Power AC L2 or DC -
Input +
Input -
Output +
Output -
