Omron DRT2 Smart DeviceNet I/O Units
DRT2 is Omron's Smart DeviceNet family — IP67-rated digital and analog I/O units for DeviceNet networks, built for machine installation where a conventional DIN-rail I/O block would not survive. Units are available with M12 round connectors, MIL connectors or e-con connectors so the enclosure can stay sealed.
Lifecycle status
Digital and mixed units are current; the -AD04 and -DA02 analog units are end-of-life
DRT2 is listed as a current family. Omron's discontinuation records flag the analog units DRT2-AD04 and DRT2-DA02 as discontinued. Omron does not publish the replacement path for those two, so if you are replacing an analog unit, confirm with us before ordering.
What to fit instead: None published for DRT2-AD04 and DRT2-DA02
Key specifications
- First field letters give the function: AD analog input, DA analog output, TS thermocouple or RTD input
- Second field gives the signal type: I inputs, O outputs, M mixed, W wide
- D means 16 or 32 point transistor I/O, H means 16 point high-function inputs
- Connectivity: C and CL are IP67 round M12, ML and MLX are MIL connector with or without a 10 cm cable, S is e-con, TA is a three-tier screw terminal block
- ROS is the relay-output model at 3 A, 240 VAC / 24 VDC — the only DRT2 with mechanical relay contacts
- A trailing -1 on a digital output unit denotes PNP; without it the unit is NPN
How to read a DRT2 model number
Four letters and a point count. The connector suffix is the part that decides whether it fits your enclosure.
| Unit | Function | Points / rating |
|---|---|---|
| DRT2-DA02 | Analog output | 2 channel — note: discontinued |
| DRT2-ID16 | Digital input, transistor, 16 point | 16 points, NPN/PNP per suffix |
| DRT2-ID16S | Digital input, 16 point, e-con connector | 16 points |
| DRT2-MD16 | Mixed digital in/out, transistor, 16 point | 16 points |
| DRT2-MD16S | Mixed digital, 16 point, e-con connector | 16 points |
| DRT2-OD16-1 | Digital output, transistor, 16 point, PNP | 16 points |
| DRT2-OD32ML | Digital output, transistor, 32 point, MIL connector | 32 points |
| DRT2-ROS16 | Relay output unit | 16 relay points, 3 A 240 VAC / 24 VDC |
IP67 C and CL variants use round M12 connectors. The M12 and MIL families are not interchangeable with e-con units, so confirm the enclosure penetration before ordering.
Where these parts get used
- Washdown or food-area machine where the I/O has to live outside the panel in an IP67 enclosure
- Retrofit of a DeviceNet machine where an analog point has failed and the DRT2 replacement drops into the same cable entry
- A line needing mechanical relay outputs to drive contactors while the rest of the I/O stays transistor-based
Which model do you need
- Choose DRT2-ROS16 when the load needs a dry contact — it is the only DRT2 unit with mechanical relay outputs.
- Confirm the connector type against your enclosure: M12, MIL and e-con are three different physical families.
- Check output polarity before ordering — a trailing -1 is PNP, and the wrong polarity will not drive your field device.
- If you are replacing an analog unit, note that DRT2-AD04 and DRT2-DA02 are discontinued and Omron publishes no replacement.
All 8 Omron DRT2 Smart DeviceNet I/O Units SKUs
Every part number below links to its own page with full specifications, compatibility notes and stock status.
Frequently asked
What does DRT2-MD16 mean?
A mixed digital input and output unit with 16 transistor I/O points. The M is the mixed signal type, D means 16 or 32 point transistor I/O, and 16 is the point count. The S suffix on DRT2-MD16S selects the e-con connector instead of the standard one.
Is DRT2 a relay?
Mostly no. DRT2 is a Smart DeviceNet I/O family — digital and analog input and output units for a DeviceNet network. Only the DRT2-ROS16 uses mechanical relay contacts, at 3 A, 240 VAC or 24 VDC. The rest are transistor I/O.
Which DRT2 connector type should I choose?
It depends on your enclosure. C and CL variants are IP67 with round M12 connectors, ML and MLX use MIL connectors with or without a short cable, S is an e-con connector, and TA is a three-tier screw terminal block. These are physically different and are not interchangeable — tell us how the cable enters the cabinet and we will match it.
Is DRT2-DA02 still available?
It is flagged as discontinued, and Omron does not publish a designated replacement. The digital and mixed digital units remain current. If you specifically need the 2-channel analog output, confirm availability with us before ordering.
Specification sources
Specifications on this page were checked against Omron's own documentation. If a figure here disagrees with your datasheet, the datasheet wins — tell us and we will correct it.
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