TM3DQ16R | Schneider Electric 16-Ch Relay Output Module

TM3DQ16R: 16-Channel Relay Output Expansion for Modicon M2xx

Machine builders often need more discrete outputs than a compact PLC provides. The Schneider Electric TM3DQ16R solves that constraint directly. It is a digital output expansion module from the Modicon TM3 series. Specifically, it delivers 16 normally-open relay channels for switching loads across 5-30 Vdc or 5-250 Vac circuits. Consequently, one module covers mixed DC and AC actuation without external interposing relays.

TM3DQ16R Key Specifications and Output Capability

• Channels: 16 normally-open relay outputs
• Output current: 2 A per channel, 7 A per common line
• Voltage range: 5-30 Vdc / 5-250 Vac (max)
• Isolation: 500 V AC output-to-logic; 1500 V AC between channel groups
• Supply: 24 Vdc via the TM3 bus
• Bus current: 37 mA at 5 V DC with all outputs on; 5 mA with all outputs off
• Dimensions: 90 × 27.4 × 84.6 mm; weight 0.11 kg
• Protection: IP20; operating range 0...+55 °C

The 7 A per common line rating is the distinctive parameter here. It permits several 2 A channels to energize simultaneously on one common without exceeding the shared conductor limit. Therefore, dense output groups remain feasible in space-constrained panels.

Isolation and Electrical Integrity

Electrical noise on switched loads can corrupt logic-level signals. The TM3DQ16R addresses this with 500 V AC isolation between outputs and internal logic. Additionally, 1500 V AC separates channel groups. As a result, a fault on one group cannot easily propagate to another. The module reports module status and bus status for diagnostics. However, response time follows mechanical relay behavior, so high-frequency switching is not its purpose. For precise electrical specifications, refer to the official datasheet.

Compatibility and Integration

The module integrates with Modicon M221, M241, M251 and M262 platforms through the TM3 bus. Wiring uses a removable screw terminal block with 3.81 mm pitch, which simplifies field replacement. When integrating into fieldbus architectures, note that wiring into such networks may require an external gateway or connection module. Confirm cables and gateways with the supplier before commissioning.

Applications and Engineering Fit

Relay outputs suit pilot duty on solenoid valves, contactors, indicator lamps and small motor starters. In a packaging line, for example, one TM3DQ16R can drive sixteen discrete actuators while keeping AC and DC circuits on separate channel groups. Furthermore, the 2 A per channel rating removes the cost and panel space of sixteen discrete relays. The 24 Vdc bus supply also keeps wiring consistent with the host controller.

Installation and Maintenance Notes

Mount the module within the controller's expansion envelope and respect the 0...+55 °C operating range. Keep the IP20 enclosure inside a suitable cabinet. Inspect terminal torque and relay contact wear periodically. Because relay contacts are mechanical, switching cycles and load type determine service life. Therefore, log high-cycle outputs and plan replacement before contact degradation affects machine availability.

Availability

The TM3DQ16R is active and in stock and ready to ship. Contact AutoDCSTech with your exact requirements for precise matching.