Schneider TSXASR402 Analog Output Module

The Schneider Electric TSXASR402, also cataloged as the TSXASR402 Analog Output Module, operates as a dedicated hardware component for analog loop control within TSX 47/67/87/107 automation network platforms. The module converts multi-bit digital register data from the CPU into continuous, low-latency current loop arrays to govern variable downstream control components.

Hardware Specifications

Schneider Electric Deterministic Network Architecture

• I/O Density Scaling Control Matrix: The 4-channel layout integrates with the standard rack addressing scheme to manage dense I/O configurations. The internal digital-to-analog converter (DAC) array transforms stored 12-bit binary words into precise electrical current variables, driving final control elements while maintaining steady update cycles over the host backplane bus communication link.
• Firmware Flash Compatibility and Bus Integrity: The electronic component interface matches standard host backplane parameters to secure loop operation. This structural alignment ensures clean parameter tracking between the output DAC registers and the main CPU, preventing transmission drops or signal drift across the active current loops.

Frequently Asked Questions

Q: Can the TSXASR402 module be unseated or replaced while the control rack is fully energized?

A: No. Removing this analog output card while the backplane power tracks are active can cause voltage spikes across the data lines. This can damage internal logic components or drop downstream 4-20 mA control signals, forcing active control loops into unsafe states.

Q: How does the module handle a total loss of external 24 VDC load loop power?

A: A drop in the external 24 VDC loop voltage disables the 4-20 mA output generation. The internal diagnostic circuits flag this low-power fault on the bus, allowing the system processor to log a channel error while driving parallel channels into pre-configured fallback positions.

Field Installation Guidelines

• Chassis Layout Alignment, Clearance Constraints, and Mechanical Seating: Insert the single-slot module vertically into the targeted card cage track. Guide it firmly until the rear high-density pins seat square into the backplane receptacle, then lock the top and bottom mechanical latches to secure the card against low-frequency industrial vibration.
• Conductor Separation, Wireway Constraints, and Shield Grounding: Route all 4-20 mA analog output twisted-pair lines through dedicated low-voltage wiring trays separate from high-potential three-phase AC power cables or inductive switching loops. Connect the signal cable shielding braids directly to the enclosure copper ground rail to isolate the 12-bit conversion circuitry from ambient electromagnetic interference.