Schneider TSXCAY21C Motion Control Module

The Schneider TSXCAY21C controls one servo axis for Modicon Premium PLC systems. This motion module generates pulse train outputs for stepper or servo drives. You will find it in positioning applications like pick-and-place machines. It supports trapezoidal and triangular motion profiles with high accuracy. Therefore, this unit delivers precise axis control for automation cells.

This module measures 130 mm in height and 45 mm in width. Its depth reaches 100 mm for standard rack mounting. The unit weighs approximately 0.42 kilograms. It contains one 32-bit DSP and eight optocouplers. Two differential line driver outputs provide the control signals. Additionally, you get six status LEDs for motion diagnostics.

Key Technical Specifications

Parameter	Value
Manufacturer	Schneider Electric (Telemecanique)
Model	TSXCAY21C
Product Type	Motion Control Module
Number of Axes	1
Output Type	Pulse train (line driver)
Maximum Frequency	500 kHz
Output Voltage	5 VDC differential
Position Range	±16,777,215 counts
Acceleration Steps	255 programmable levels
Profile Types	Trapezoidal, triangular
Height	130 mm
Width	45 mm
Depth	100 mm
Weight	0.42 kg
DSP Processor	32-bit @ 40 MHz
Optocouplers	8 (isolation)
Status LEDs	6 (PWR, RDY, ERR, LIMIT)
Energy Storage	≈ 200 µF (capacitive)
Power Consumption	250 mA @ 5 VDC
Operating Temperature	0°C to +55°C

Internal Architecture and Energy Storage

The Schneider TSXCAY21C stores minimal energy in its filter capacitors. Small electrolytic capacitors hold approximately 200 microfarads total capacitance. A 32-bit DSP runs all motion control algorithms at 40 MHz. This processor generates pulse trains with 500 kHz maximum frequency. Two differential line drivers convert TTL signals to RS-422 levels. Four optocouplers isolate the homing and limit switch inputs. Another four optocouplers isolate the general-purpose I/O points. The module includes a dedicated encoder feedback input for closed-loop control.

Connection Interfaces and Wiring Details

You will find a 20-pin removable terminal block on the bottom face. This block accepts pulse outputs, limits, and encoder signals. Connect the pulse (+) and direction (+) wires to terminals 1 and 2. Connect pulse (-) and direction (-) wires to terminals 3 and 4. Use twisted-pair shielded cable for all signal runs. The Schneider TSXCAY21C requires an external 24 VDC supply for inputs. Connect the home limit switch to terminals 5 and 6. Connect the positive and negative over-travel switches to terminals 7-10. Six LEDs show power, ready, error, and limit status. A green RDY LED lights up when the module initializes correctly.

Configuration and Installation Steps

You slide this module into any I/O slot of the Premium rack. First, align the module with the upper and lower card guides. Then, push it firmly until the backplane connector seats completely. Secure the front panel with the two retaining screws. Use the PL7 or Unity Pro software to configure motion parameters. Set the acceleration, deceleration, and target velocity values. The Schneider TSXCAY21C stores motion profiles in its local memory. Define the homing sequence and limit switch polarities. Download the configuration to the module before testing. Always home the axis before executing any absolute move commands.