The interface layer between the sensor and the control system: isolation, conversion, display, alarm and digital integration in one DIN-rail package.
Need a specific variant?
Ranges, threads, connectors and cable lengths can be modified at the factory from 50 pieces.
Request a quote Ask an engineerLead time5-14 days
CalibrationIncluded
Custom buildFrom 50 pcs
Most sensor problems that reach the control room are interface problems. A 4-20 mA signal picked up 40 mV of noise from a variable frequency drive, or a grounded thermocouple created an earth loop, and the reading is wrong while every component tests fine on the bench. A signal conditioner with galvanic isolation solves both, and it costs less than the downtime it prevents.
The DuoMy range includes isolating conditioners with 1,500 V isolation, multi-channel units for compact panels, loop-powered indicators for local readout without extra wiring, alarm modules with relay outputs, and IO-Link masters that bring parameterised sensors into a PLC over a single network cable.
All units are DIN-rail mounted with removable terminals, are configured by DIP switch or PC software, and carry CE and UL approval. For panels that also need hazardous-area separation, the same housing accepts intrinsic safety barriers.
Range Overview
Each variant exists because a different application needs it. The distinction is usually mechanical or environmental rather than a better accuracy figure.
Galvanic isolation and conversion between 4-20 mA, 0-10 V, RTD and thermocouple inputs, with 1,500 V isolation.
Four or eight channels in one housing for compact panels, with per-channel configuration and diagnostics.
Two-wire displays that take their power from the current loop and show the value at the machine without extra cabling.
Field and cabinet masters that connect up to eight IO-Link sensors to PROFINET, EtherNet/IP or Modbus TCP.
Limit monitoring with relay or solid-state outputs for interlock, over-temperature and dry-run protection.
Catalogue
DM-SD24-LPI-2R
DM-SC08-IOL-PN
DM-SC04-ISO-4CH
Technical Range
Figures below are the range across the family, not a single model. Specify the exact range, accuracy and connection on the quote request and we will confirm which variant meets it.
Request a specification check| Parameter | Typical |
|---|---|
| Input types | 4-20 mA, 0-10 V, RTD, TC, potentiometer |
| Output types | 4-20 mA, 0-10 V, relay, Modbus RTU |
| Isolation | 1,500 VAC input/output/supply |
| Accuracy | ±0.1% of span |
| Supply voltage | 24 VDC or 100-240 VAC |
| Response time | 10-50 ms |
| Mounting | 35 mm DIN rail |
| Operating temperature | -20 to +60 °C |
| Certifications | CE, UL, RoHS |
Applications
Isolation breaks the earth loop and rejects common-mode noise from VFDs and welding equipment.
One universal module accepts mA, V, RTD and thermocouple, which simplifies spares and reduces panel variants.
IO-Link masters bring parameter data and diagnostics from smart sensors into the PLC without extra analogue cards.
Loop-powered indicators and trip amplifiers give operators a value and an interlock without a separate display panel.
Selection Guide
Any signal leaving the panel or crossing between buildings should be isolated. It is the cheapest reliability improvement in most retrofits.
A multi-channel unit saves rail space and wiring, but a failed channel takes four with it. Single-channel modules are easier to swap.
A loop-powered indicator drops voltage. Verify the total burden against the transmitter's minimum supply before specifying.
The master defines the fieldbus, not the sensor. Choose PROFINET, EtherNet/IP or Modbus TCP based on the PLC you already have.
DIP switches are field-serviceable without software; PC configuration allows scaling and linearisation. Many panels need both.
FAQ
Only if you have noise, an earth loop or a long cable run. In a clean panel a direct connection is fine. Where a VFD is nearby, or the sensor is outdoors or in another building, an isolating conditioner pays for itself the first time an intermittent fault is avoided.
It breaks the conductive path between input, output and supply, so a difference in earth potential cannot drive current through the signal cable. That removes earth-loop error and stops a fault on one side from damaging equipment on the other.
Universal-input models can, and the input type is set by DIP switch or software. The trade-off is a slightly longer configuration step and a marginally higher cost than a dedicated module.
Digital transmission is immune to the cable resistance and noise that affect analogue signals, and the sensor can send parameters, identification and diagnostics over the same wire. You also get remote parameterisation, which matters when sensors are inside a machine guard.
The standard modules are for safe-area panels. For Zone 1 and Zone 2 you need an Ex nA or an intrinsically safe barrier version; we supply both in the same DIN-rail footprint.
Tell us the application and we will confirm the right variant.