The MTT MS3902 Chassis-mounting RTD Transmitter converts the resistance variation from an RTD sensor into a standard isolated DC output, with built-in linearization and burnout protection handled on board. Mounting directly onto its RC3900 chassis base rather than a DIN rail, it is intended for panels that need to pack a high density of temperature-monitoring channels into a compact space.
The transmitter supports the common RTD types — Pt100, JPt100, Pt50, Cu25Ω, Cu100Ω, and Ni508.4Ω — with the specific temperature range configured to match the application within the sensor’s resistance-temperature table limits. Two independently configurable outputs are available in various current and voltage combinations, front-accessible trimmers allow zero and span to be adjusted, and isolation between input, both outputs, and power keeps each channel electrically independent. Anti-humidity PCB coating helps the MS3902 hold up in demanding panel environments.
| RTD Types | Pt100, JPt100, Pt50, Cu25Ω, Cu100Ω, Ni508.4Ω, or custom |
| Excitation Current | Approx. 1mA |
| Lead Wire Resistance | 200Ω/wire max |
| Temperature Range | Customizable within RTD resistance-temperature table limits |
| Output Options | Dual outputs, combinations of 1-5V DC, 0-5V DC, 0-10V DC, ±5V DC, ±10V DC, or 4-20mA DC |
| Output Load | 2mA max (voltage); 300Ω max (current) |
| Adjustment | Approx. ±2% of span, zero and span, via front trimmers |
| Burnout Protection | Upward configuration |
| Accuracy | ±(0.15% F.S. + 0.1°C) at 25°C±5°C; ±0.2% of span per 10°C temperature effect |
| Response Time | 170ms max (0-90%); adjustable response frequency up to 200Hz and time down to 2ms via options |
| CMRR | 100dB min. |
| Isolation | Across input, Output 1, Output 2, and power, mutually isolated; 100MΩ min. insulation resistance @500V DC; 1500V AC dielectric strength (1 min) input to other ports, 500V AC (1 min) between outputs and power |
| Surge Withstand | Per ANSI/IEEE C37.90.1-1989 |
| Power Supply | 24V DC ±10%, 50mA max; 300mA fuse standard |
| Dimensions | W19.5 x H53 x D84mm |
| Weight | Approx. 70g |
| Mounting | Chassis mount on RC3900-series mounting base |
| Operating Conditions | 0-55°C, 90% RH max non-condensing |
| Storage Temperature | -10 to 60°C |
| Additional Features | Anti-humidity PCB coating (HumiSeal 1A27NS polyurethane) |
Frequently Asked Questions
What is the MTT MS3902 used for?
It converts the resistance variation from an RTD sensor into a standard isolated DC output, with built-in linearization and burnout protection handled on board. Like the MS3901, it is a chassis-mount module that sits on an RC3900 base instead of a DIN-rail housing.
Which RTD types are supported?
Pt100, JPt100, Pt50, Cu25Ω, Cu100Ω, and Ni508.4Ω, with the temperature range configured to match the application within the sensor’s resistance-temperature table limits. Tell us your RTD type and measuring range and we can confirm the configuration.
Can I get dual outputs from one unit?
Yes, two independently configurable outputs are available in various current and voltage combinations, with isolation between input, both outputs, and power keeping each channel electrically independent.
Why chassis-mount instead of a DIN-rail module?
The MS3902 mounts directly onto an RC3900 chassis base, which suits panels that need a high density of temperature-monitoring channels in a compact space, rather than individual DIN-rail housings for each channel.
How do I know if the MS3902 is right for my application?
If you’re measuring with an RTD and need a high-density, chassis-mounted transmitter for a multi-channel panel, the MS3902 on an RC3900 base covers that. Send us your RTD type, temperature range, and output signal requirement and we’ll confirm before you order.
Download MTT MS3902 Chassis-mounting RTD Transmitter information here
Datasheet: MTT_MS3902_Datasheet
