Why Engineers Choose the TM3DQ16R for Relay Output Expansion
When a Modicon M221, M241, M251, or M262 controller runs out of relay outputs, you need an expansion module that adds channels without adding complexity. The Schneider Electric TM3DQ16R solves that problem. It is a Modicon TM3 digital output module with 16 normally open relay channels, each rated up to 2 A. This module suits machine builders and panel integrators who want flexible switching of valves, lamps, contactors, and other discrete loads.
What the TM3DQ16R Delivers in Real Panels
The TM3DQ16R is a digital output module from the Modicon TM3 series. It provides 16 relay output channels with normally open contacts. Each channel handles up to 2 A, and each common line carries up to 7 A. The output range covers 5-30 Vdc and 5-250 Vac, so the same module can switch low-voltage DC signals and higher-voltage AC loads. Isolation reaches 500 V AC between output and internal logic, and 1500 V AC between channel groups. That separation protects the controller side from load-side transients.
Key Specifications at a Glance
| Specification | Value |
|---|---|
| Module type | Digital output (relay) |
| Channels | 16 |
| Signal type | Relay output, NO (normally open) |
| Output range | 5-30 Vdc / 5-250 Vac (max) |
| Output current | 2 A per channel (max), 7 A per common line |
| Isolation | 500 V AC output to logic; 1500 V AC between channel groups |
| Supply voltage | 24 Vdc (via TM3 bus) |
| Bus current | 37 mA at 5 V DC (all outputs on); 5 mA (all outputs off) |
| Operating temperature | 0…+55 °C |
| Protection rating | IP20 |
| Dimensions (H×W×D) | 90 × 27.4 × 84.6 mm |
| Weight | 0.11 kg |
Installation and Setup Guidance
The TM3DQ16R mounts as a TM3 expansion module beside a compatible Modicon controller. Wiring uses a removable screw terminal block with 3.81 mm pitch, which speeds up panel assembly and field replacement. Keep the module within the 0…+55 °C operating range and respect the IP20 rating by installing it inside a suitable enclosure. Route load wiring away from sensitive signal cables to reduce electrical noise.
Compatibility and Integration
The module works with Modicon M221, M241, M251, and M262 platforms. It draws 24 Vdc through the TM3 bus, so no separate field supply is needed for the module itself. Bus current is 37 mA at 5 V DC with all outputs on and 5 mA with all outputs off. Module status and bus status diagnostics help you confirm healthy communication after commissioning.
Maintenance and Reliability
Relay outputs are mechanical devices, so contact life depends on load type and switching frequency. Inspect terminal connections periodically and follow the manufacturer’s safety manual for all service work. Keep the panel free of dust and moisture to protect the IP20-rated module. If you need to confirm availability or a replacement option, contact SpareTechPLC before ordering.
Selection Checklist Before You Buy
Confirm your controller model supports TM3 expansion. Verify that your load voltage falls within 5-30 Vdc or 5-250 Vac and that per-channel current stays at or below 2 A. Check that total current per common line does not exceed 7 A. Count your required output channels and allow spare capacity for future changes. SpareTechPLC supplies genuine Schneider Electric automation parts and can help you verify lifecycle status.
Frequently Asked Questions
How many relay outputs does the TM3DQ16R provide?
It provides 16 normally open relay output channels.
Which controllers work with this module?
It is compatible with Modicon M221, M241, M251, and M262 platforms.
What is the maximum current per channel?
Each channel supports up to 2 A, with 7 A maximum per common line.
What voltage range do the relay outputs support?
The outputs cover 5-30 Vdc and 5-250 Vac maximum.
Is the module still in active production?
Yes, the lifecycle status is active as last verified in 2026-09.
