MM4001 Text

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MM4001
RTD INPUT
TRANSMITTER

FEATURES

Provides DC Output Proportional to an RTD Input

3-Wire or 2-Wire, 10 ohms to 2000 ohms RTDs

Unlimited* Choice of Input/Output Ranges

Linearized for Platinum RTDs

Fully Isolated Output Available

Choice of Power Options

10 + 5 Year Warranty

DESCRIPTION

The MM4001 provides an output voltage or current proportional to an RTD input signal. It is useful in measuring temperatures with a variety of RTDs.

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

The module utilizes a single constant current source to excite the RTD. An accurate and stable lead wire compensation circuit uses the third lead of the 3-wire RTD to compensate for the RTD lead resistance.

TYPICAL APPLICATIONS

Temperature control, monitoring, 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

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

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

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 for ISO option
    if full scale output >20 mA

OPEN SENSOR OUTPUT
> = full scale

ACCURACY
±0.1% of span

LINEARITY
(Pt RTD, output vs temp)
±0.05% of span
temp > = 32°F/0°C

±0.15% of span
temp < = 32°F/0°C

(others, output vs res)
±0.01% of span

COMMON MODE REJECTION
120 dB, DC to 60 Hz

ISOLATION (Optional)
Output/Input
>500 megohms

Breakdown Voltage
>1000 VAC rms

OUTPUT RIPPLE
<0.1% of span
(peak to peak)

BREAKDOWN, P0WER/CIRCUITRY
>1500 VAC rms

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)
    (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.

CONNECTIONS
Power AC L1 or DC +
Power AC L2 or DC -
RTD Lead Compensation
RTD -
RTD +
Output +
Output -

PINS
1
3
4
5
6
7
8