Product Specification Sheet
Model: MS2902
MS2900Chassis-Mount RTD Temperature Transmitter with Isolated Dual
OutputDESCRIPTION
The MS2902 is a chassis-mount RTD temperature transmitterthat supplies constant current to a three-wire RTD andconverts its mV input signals into mutually isolated dual
channel DC output signals.
▽ Features linearization and burnout protection.
▽ A multi-slot chassis provides ease of maintenance andhigh-density mounting.
▽ Input, output 1, output 2, and power circuits are allisolated from each other.
▽ Equipped with a fuse on the DC power line asstandard.

ORDERING INFORMATION
Ordering CodeMS2902-□ (□–□)-8□□
[1]

[2]

[3]

SPECIFICATIONSPOWER SECTION
Power24V DC±10%
Requirement
PowerBetter than ±0.1% of span per 10%
Sensitivity
change in supply voltage
Power Line Fuse 300mA fuse
Current
50mA max.
Consumption
INPUT SECTION
Input
JIS or other 3-wire RTDs
Code(Specify a code in ■ Pt 100Ω ···························· Pt100
the field [1].)■ JPt 100Ω ·························· JPt100■ Other than those above················ X
Specify an RTD standard (A) andsymbol (B) as indicated below:
X=A/BNotes:
1. When a JIS symbol is specified, theresistance table of the latest edition of
the relevant JIS will be used, unlessotherwise requested.
2. For other RTD types, submission of a
resistance table may be required.
Input Range
Specify an input range in °C within the(Specify a range in range given in the resistance table.
the field [2].)Excitation
Current
Input Lead WireResistanceApprox. 1mA with Pt for 0 to 100°C200Ω max. per wire

Lead-Wire
ResistanceSensitivity

Better than 0.1% of span per 5Ω

OUTPUT SECTION
OutputOutput 1 / Output 2 ··················· Code(Specify a code in ■ 1–5V DC / 1–5V DC ·················V1the field [3].)■ 0–5V DC / 0–5V DC ·················V5■ 0–10V DC / 0–10V DC ··············V6■ 1–5V DC / 4–20mA DC ············· C1
Note: Combinations of two outputs are
only available as shown above.
AllowableVoltage output: 2mA max.
Output LoadCurrent output: 300Ω max.
Zero Adjustment Approx. ±2% of span
(Adjustable by front-accessible trimmer)
Span Adjustment Approx. ±2% of span
(Adjustable by front-accessible trimmer)
Burnout
UpscaleProtection
PERFORMANCE
Accuracy Rating Better than ± (0.15% of span + 0.1°C) (at25°C±5°C)
Temperature
Better than ±0.2% of span per 10°C
Effectchange in ambient.
Burnout Drive
30ms max.
TimeStandardApprox. 2Hz−3dB
Response Time
Isolation
Isolation between input, output 1, output
2, and power.
Insulation
100MΩ min. (@ 500V DC) between
Resistance
input, output 1, output 2, and power.
Dielectric
Input / [Output 1, Output 2, Power]:Strength
1500V AC for 1 minute (Cutoff current:0.5mA)
Output 1 / Output 2 / Power: 500V AC for
1 minute (Cutoff current: 0.5mA)
Surge Withstand Tested as per ANSI/IEEE C37.90.1-1989.
Capability
OperatingAmbient temperature: 0 to 55°C
Environment
Humidity: 5 to 90% RH (non-condensing)Rev. 3.60

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Product Specification Sheet

Storage
Temperature
PHYSICAL
Installation
WiringExternalDimensions
WeightModel: MS2902 Chassis-Mount RTD Temperature Transmitter with Isolated Dual Output−10 to 60°C

MATERIAL
Housing
PC Board
Potting Agent

ABS resin (UL 94V-0)
Glass fabric, epoxy resin (FR-4: UL 94V-0)

Polyurethane

Mounted in an optional chassis (RC2900).
Wired to an optional chassis (RC2900).
W17.5 × H48 × D65 mm
70g max.

BLOCK DIAGRAM AND CONNECTION DIAGRAM

ISOLATION
CIRCUITCONSTANTLINEARIZER CURRENTCIRCUITOUTPUT-1
CIRCUITAMPREFERENCERESISTOROUTPUT-2
CIRCUITPOWER
CIRCUIT

POWER(24V DC)CHASSISI/O PIN LAYOUT

Rev. 3.60

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