The MTT MS3772 Slim Plug-In Programmable RTD Temperature Transmitter converts a 3-wire RTD input into a standard isolated DC current or voltage output, supporting Pt100, JPt100, and Pt50 sensor types on a single hardware platform. Rather than stocking a different transmitter for each RTD type and range combination, panel builders can configure one MS3772 to match the sensor and temperature span the application calls for.
Setup is done from a PC over an RS-232C connection, where the RTD type, measuring range, output configuration, and burnout behavior are all programmed digitally, and zero and span are fine-tuned the same way rather than with mechanical trimmers. Selectable burnout protection drives the output upscale or downscale if the RTD lead opens, giving an unambiguous fault indication, while LED status indicators show run and fault conditions at a glance. Four-way isolation between input, both outputs, and power keeps the transmitted temperature signal protected from noise and ground loops.
| Input Signal | 3-wire RTD (JIS standard) |
| RTD Options | Pt 100Ω (ITS-90/IPTS-68), JPt 100Ω (JIS ’89), Pt 50Ω (JIS ’81) |
| Temperature Range | -200 to 660°C (varies by RTD type) |
| Excitation Current | Approx. 1mA |
| Lead Wire Resistance | 200Ω max per wire |
| Minimum Input Span | 25°C |
| Input Accuracy | 0.01-0.02% factor (inversely proportional to span) |
| Output Options | Single: 4-20mA DC, 0-10V DC, 0-5V DC, 1-5V DC; Dual: current/voltage or current/current combinations |
| Output Load | 2mA max (voltage); 750Ω max (single 4-20mA) |
| Adjustment | ±4% of span, zero and span, configured via RS-232C |
| Output Accuracy | ±0.04% max |
| Burnout Protection | Selectable upscale, downscale, or none; detection time 10s max |
| Isolation | 4-way isolation between input, Output 1, Output 2, power, and ground; 2000V AC dielectric strength for 1 minute |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Response Time | 260ms max (0-90%, step input) |
| Temperature Effect | 100ppm/°C max |
| Power Supply | 100-240V AC (50-60Hz), 24V DC, or 100-240V DC; single output 5.0VA max (AC) / 1.1W max (24V DC); dual output 5.0VA / 1.5W max |
| Dimensions | W29 x H86 x D125mm |
| Weight | 120g (main unit) / 80g (socket) max |
| Terminals | M3.5 screw terminals, 0.8-1.0 Nm torque, gold-plated contacts |
| Mounting | Wall or DIN rail mount |
| Operating Conditions | -5 to 55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
| Additional Features | RS-232C PC configuration; LED status indicators (blue/red) |
Frequently Asked Questions
What is the MTT MS3772 used for?
It converts a 3-wire RTD input into a standard isolated DC current or voltage output, with the RTD type, measuring range, and burnout behavior all set through configuration rather than ordered as a fixed model. This lets one hardware platform cover applications that would otherwise need a different transmitter for each RTD type and range.
Which RTD types are supported?
Pt100 (ITS-90/IPTS-68), JPt100 (JIS ’89), and Pt50 (JIS ’81), across a temperature range of -200 to 660°C depending on the RTD type selected. Tell us your RTD type and expected temperature range and we can confirm the configuration.
How is it configured for a specific RTD type and range?
Configuration is done via RS-232C, where the RTD type, measuring range, and output span are all set in software rather than by physical model selection, with zero and span fine-tuned digitally on top of the base configuration.
What happens if the RTD lead opens or breaks?
Burnout protection is selectable: the output drives either full upscale or full downscale on an open RTD lead, so your control system sees an unambiguous fault rather than a signal that drifts and could be mistaken for a real reading.
How do I know if the MS3772 is right for my application?
If you’re measuring with a 3-wire RTD and need an isolated transmitted signal with configurable range and burnout behavior, the MS3772 covers Pt100/JPt100/Pt50 in one slim DIN-rail unit. Send us your RTD type, measuring range, and required output signal and we’ll confirm before you order.
Download MTT MS3772 Slim Plug-In Programmable RTD Temperature Transmitter information here
Datasheet: MTT_SpecSheet_MS3772_Rev23_E
