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Product Introduction
The Schneider TWDDRA16RT is a 16-channel discrete output module designed for use with the Twido series of programmable logic controllers (PLCs). The module is a versatile and reliable solution for controlling a variety of industrial output devices such as solenoids, relays, lamps, contactors, and alarms. It features relay-type outputs, providing electrical isolation between the PLC and connected equipment, and offering excellent flexibility across different voltage ranges (AC/DC). The TWDDRA16RT is ideal for demanding industrial applications where durability, noise immunity, and flexible control logic are required.
Its compact size, modularity, and compatibility with Schneider’s Twido system make it an essential building block in creating scalable, cost-effective automation solutions. Each output channel provides independent control, with robust protection mechanisms ensuring safe and consistent operation over time.
Product Parameters
| Parameter | Specification |
|---|---|
| Product Code | TWDDRA16RT |
| Module Type | Discrete Output Module (Relay) |
| Number of Output Channels | 16 |
| Output Type | Relay (Form C – SPDT) |
| Output Voltage Range | 5 VDC to 250 VAC / 5 VDC to 30 VDC |
| Maximum Load per Output | 2 A @ 250 VAC or 2 A @ 30 VDC |
| Total Current for Module | 8 A Max (Simultaneous) |
| Minimum Load | 5 mA |
| Switching Frequency (Resistive Load) | 1 Hz |
| Relay Lifetime (Resistive Load) | 100,000 cycles at rated load |
| Isolation Voltage | 500 VAC between relay contacts and logic |
| Diagnostic LEDs | Yes (1 per output channel) |
| Power Supply Voltage (PLC rack) | 24 VDC |
| Mounting | DIN Rail or Panel Mount |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| Relative Humidity (non-condensing) | 5% to 95% RH |
| Vibration Resistance | 2 g (10 to 150 Hz) |
| Shock Resistance | 15 g (11 ms) |
| Dimensions (H x W x D) | 125 × 100 × 70 mm |
| Weight | 0.085 kg |
| Standards / Approvals | CE, cULus, CSA, RoHS |
Applications
The TWDDRA16RT module is widely used in a broad range of industrial and commercial automation systems. Its versatility and relay isolation make it suitable for:
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Factory automation: controlling motors, solenoids, alarms, and conveyor systems.
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Process control: managing pumps, valves, and actuators in industries such as food and beverage, chemicals, and pharmaceuticals.
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Building automation: switching HVAC equipment, lighting systems, security systems.
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Water treatment plants: operating pumps, valves, and warning systems.
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Packaging machinery: controlling clutches, ejectors, and reject systems.
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Energy management: controlling distributed energy assets, generator start-stop functions.
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Material handling systems: managing lifters, hoists, sorters, and sensors.
Advantages
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High flexibility: Relay outputs support both AC and DC loads.
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Electrical isolation: Ensures high safety between control logic and field devices.
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Universal compatibility: Can control a wide variety of output devices.
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Reliable operation: Proven relay technology suitable for industrial environments.
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Compact modular design: Saves valuable panel space.
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Visual diagnostics: LED indicators for easy monitoring of each output channel.
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Robust construction: Resists vibration and shock in industrial settings.
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Long operational life: High-quality relays rated for extended use cycles.
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Simple integration: Seamless with Twido PLCs and programming via TwidoSuite.
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Maintenance-friendly: Easy to replace or expand in modular installations.
Frequently Asked Questions (FAQ)
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Is the TWDDRA16RT compatible with Modicon M221 or M241 PLCs?
No, this module is specifically designed for Schneider Twido PLCs. -
Can I connect mixed AC and DC loads to different channels?
Yes, as the relay outputs are isolated, you can wire AC and DC loads to different channels. -
Does this module support high-speed switching?
Relay-based modules are not suited for high-speed switching; typical switching rate is 1 Hz. -
Is a separate power supply needed for the relay contacts?
Yes, the load side must be powered independently depending on the device voltage. -
What is the coil driving voltage?
The module is powered through the PLC’s internal 24 VDC bus. -
Does it include surge suppression for inductive loads?
External suppression (RC circuits, diodes) is recommended for inductive loads to extend relay life. -
Is this module suitable for safety-critical applications?
It can be used in non-safety applications. For SIL-rated applications, safety-certified modules should be used. -
Can the module operate at temperatures below 0°C?
No, it is rated for 0°C to +55°C for operation. -
How can I check the status of each relay output?
Each output has an individual LED indicator that lights up when the output is energized. -
What happens if the load exceeds the maximum rated current?
The relay may be damaged if loads exceed rated limits. Always ensure proper load sizing and protection.
Recommended Models (Same Series / Related)
| Model | Description |
|---|---|
| TWDDDI8DT | 8-channel discrete input module (24VDC) |
| TWDDDO8TT | 8-channel transistor output module |
| TWDDRA8RT | 8-channel relay output module |
| TWDDAI8 | 8-channel analog input module |
| TWDDAO2 | 2-channel analog output module |
| TWDDRA16RT | 16-channel discrete relay output module |
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| Model | Description |
|---|---|
| BMXP342020 | Modicon M340 PLC Processor |
| TM221CE24T | Modicon M221 logic controller |
| BMXDDI3202K | 32-channel discrete input module |
| BMXDDO3202K | 32-channel discrete output module |
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