Product Overview

The Schneider TSXDSY16T2 Modicon Premium Discrete Output Module provides 16 protected solid-state output channels for controlling 24 V DC devices from a compatible Modicon Premium PLC. Its transistor outputs switch DC loads according to the controller’s application logic, supporting machine sequences that coordinate actuators, indicators and auxiliary control circuits.

Each output has a rated current of 0.5 A, with a maximum current of 0.625 A per channel. The total current across the module must remain within 7 A. These limits are important when multiple outputs operate simultaneously, particularly in control panels where solenoids, indicator devices and other DC loads share the output supply.

The TSXDSY16T2 incorporates output overvoltage protection using a transil diode, reverse-polarity protection and electronic overload and short-circuit protection. Its screw-terminal block supports direct field wiring. During commissioning, technicians should verify the load current, wiring polarity, output status and protective behavior to distinguish field-circuit faults from module-related faults.

Technical Specifications

Product Features

• 16 solid-state output channels: Controls multiple DC loads through a single Modicon Premium output module.
• 24 V DC positive-logic outputs: Supports compatible DC actuators and control devices.
• Defined current limits: Supports 0.5 A rated current per output, with a maximum of 0.625 A per channel and 7 A per module.
• Transil-diode overvoltage protection: Helps suppress output-circuit voltage transients.
• Reverse-polarity protection: Uses a reverse-mounted diode in the output circuit.
• Electronic overload protection: Trips electronically under specified overload conditions and supports recovery by reactivation.
• Electronic short-circuit protection: Protects output channels against specified short-circuit conditions.
• Fast output response: Provides a specified response time of 1.2 ms.
• Screw-terminal connection: Supports organized field wiring for individual output circuits.
• PLC-controlled switching: Executes output commands generated by the Modicon Premium application.

Working Principle

The TSXDSY16T2 receives switching commands from the Modicon Premium PLC through the system backplane. When an output is commanded ON, its solid-state transistor circuit conducts and supplies the connected DC load according to the module’s positive-logic output arrangement. When the command changes to OFF, the output stops conducting, subject to the specified residual voltage and leakage current.

Each channel is rated for 0.5 A, with a maximum channel current of 0.625 A. The combined module current must not exceed 7 A. The control-panel design should therefore consider both the current drawn by individual loads and the total demand when several channels are active at once.

Protection functions address different electrical faults. The transil diode protects against output overvoltage, the reverse-mounted diode provides reverse-polarity protection, and electronic protection responds to overload and short-circuit conditions. A protective trip may require the fault to be cleared and the output reactivated before normal operation resumes.

During troubleshooting, technicians should check the PLC output command, 24 V DC supply, terminal polarity and load current. If a channel fails to drive its load, inspect the connected device and wiring before replacing the module. Low-current loads should also be evaluated against the specified OFF-state leakage current and residual voltage.

Role in a Modicon Premium Control Architecture

The TSXDSY16T2 serves as the discrete DC output interface between a Modicon Premium PLC and external control devices. The PLC application evaluates sensor inputs and operating conditions, then issues output commands to the module. The module switches compatible DC loads while its protective circuits address specified electrical faults.

Industrial Applications

Installation and Maintenance

1. Verify the module reference: Confirm that the installed module is TSXDSY16T2 and that the Modicon Premium rack and controller configuration support it.
2. Check the DC supply: Verify that the output supply is within the specified 19–30 V DC range and has sufficient capacity for the connected loads.
3. Confirm output polarity: Check positive and return wiring against the module’s terminal assignments before applying power.
4. Calculate channel current: Ensure each connected load remains within the 0.5 A rated current and the applicable 0.625 A maximum per-channel limit.
5. Calculate total module current: Confirm that the combined load current does not exceed the 7 A module limit during simultaneous operation.
6. Inspect screw terminals: Check conductor preparation, terminal tightness and signs of overheating or corrosion.
7. Verify output addressing: Match each load to the correct physical channel and PLC output address in the electrical drawings and application program.
8. Test each output: Command channels individually and verify that the connected loads switch as expected.
9. Check protective trips: If an output stops operating after an overload or short circuit, isolate the fault, correct the wiring or load problem, and follow the specified reactivation procedure.
10. Inspect inductive loads: Check the suppression arrangement for solenoids and relay coils to limit switching transients.
11. Investigate unexpected OFF-state behavior: Measure residual voltage and consider leakage current when a low-current device remains partially energized.
12. Document commissioning results: Record channel assignments, load currents, supply measurements, protection events and functional test results.

Compatible System Components

Recommended Related Models

Key Advantages

• Provides 16 protected solid-state DC output channels.
• Supports 24 V DC positive-logic loads within a 19–30 V operating range.
• Offers 0.5 A rated current per channel and a 7 A total module current limit.
• Includes transil-diode overvoltage and reverse-polarity protection.
• Uses electronic overload and short-circuit protection.
• Provides a specified output response time of 1.2 ms for responsive machine control.

Technical FAQs

How should the 0.5 A rated current and 0.625 A maximum channel current be used when selecting loads?

Use 0.5 A as the rated output current for load selection. The 0.625 A figure is the stated maximum channel current and should not be treated as the normal continuous design target. Also verify that the combined current across all active outputs remains within 7 A.

What happens when an output experiences a short circuit or overload?

The module uses electronic protection that trips under specified overload and short-circuit conditions. Remove the fault and check the connected load and wiring before reactivating the output according to the applicable system procedure.

Why can a low-current DC load remain partially energized when its output is OFF?

The output has a specified OFF-state leakage current of up to 0.5 mA and a residual voltage below 1.2 V. Some sensitive loads may respond to small residual currents, so check the load’s input characteristics and consider an appropriate interface if necessary.

What should be checked before replacing the TSXDSY16T2 with BMXDDO1602?

BMXDDO1602 belongs to the Modicon X80 platform, so replacement involves a platform migration rather than a simple module exchange. Verify controller and rack compatibility, terminal and cable arrangements, output addressing, electrical ratings and required PLC configuration changes.