The MTT MS3907 Chassis-mounting Distributor powers a two-wire, loop-powered transmitter directly and converts its 4-20mA output into two mutually isolated DC output channels, letting a single field transmitter feed two separate destinations, such as a local indicator and a PLC input, without a separate power supply or splitter. Packaged in the same compact chassis-mount format as the rest of the MS39-series, it suits panels built around MTT’s high-density RC3900 chassis platform.
A front-accessible toggle switch lets technicians turn the transmitter power on or off directly at the module, with a green LED confirming when power is active, which simplifies loop troubleshooting and commissioning. Several dual-output combinations are available, mixing voltage and current outputs to match the receiving equipment, and four-way isolation between input, both outputs, and power keeps each distributed channel electrically independent. The multi-slot chassis design supports high-density mounting where many transmitter loops need to be powered and distributed in a compact space.
| Input Signal | 4-20mA DC from two-wire transmitters |
| Input Resistance | 250Ω |
| Transmitter Power Supply | Approx. 25V unloaded; 18V at 20.48mA input |
| Max Transmitter Current | 25mA typical |
| Short-Circuit Protection | 26mA limit, continuous duration permitted |
| Output Combinations | 1-5V/1-5V DC, 0-5V/0-5V DC, 0-10V/0-10V DC, 1-5V/4-20mA DC, 4-20mA/4-20mA DC |
| Output Load | 2mA max (voltage); 300Ω (350Ω dual current) for current outputs |
| Adjustment | Approx. ±2% of span, zero and span |
| Isolation | 4-way isolation between input, Output 1, Output 2, and power; 100MΩ min. insulation resistance @500V DC; 1500V AC dielectric strength (input/outputs), 500V AC (outputs to power, 1 min, 0.5mA cutoff) |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Power Supply | 24V DC ±10%, 80mA max; 160mA fuse (dual voltage/current output) or 300mA fuse (dual current output) |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C); ±0.2% of span per 10°C temperature coefficient |
| Response Time | 85ms max (0-90%, step input at 100%) |
| Dimensions | W19.5 x H53 x D82mm |
| Weight | 80g max |
| Mounting | Chassis mount (RC3900A or RS3900-01TB) |
| Operating Conditions | 0-55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
| Additional Features | Front-accessible transmitter power toggle switch; green LED power indicator; conformal coating (HumiSeal 1A27NSLU polyurethane); optional CE compliance |
Frequently Asked Questions
What is the MTT MS3907 used for?
It powers a two-wire, loop-powered transmitter directly and converts its 4-20mA output into two mutually isolated DC output channels, letting a single field transmitter feed two separate destinations, such as a local indicator and a PLC input, without a separate power supply or splitter.
Can I turn the loop power on and off from the module?
Yes, a front-accessible toggle switch lets you power the transmitter on or off directly at the module, with a green LED confirming when power is active, which simplifies loop troubleshooting and commissioning.
What output combinations are available?
Several dual-output combinations, mixing voltage and current outputs, are available to match the receiving equipment. Tell us what your two destination devices expect and we can confirm the configuration.
Is each output channel isolated?
Yes, four-way isolation between input, both outputs, and power keeps each distributed channel electrically independent, so a fault on one output doesn’t affect the other.
How do I know if the MS3907 is right for my application?
If you have one loop-powered 4-20mA transmitter and need to feed its signal to two separate destinations, the MS3907 on an RC3900 base handles that without an extra power supply. Send us your transmitter’s output and the two destinations you need to feed and we’ll confirm before you order.
Download MTT MS3907 Chassis-mounting Distributor information here
Datasheet: MTT_SpecSheet1_MS3907_Rev220_E
