Bosch Rexroth Indramat 0811405090 DSS02.3 Command Interface Module (DIAX04)

Product Description

0811405090 is the Bosch Rexroth Indramat material number for DSS02.3, the final revision master command control card for DIAX04 multi-axis servo rack system. This board is installed in slot U1 of the DIAX04 chassis and acts as the motion master controller for the entire rack. It is the upgraded successor variant of DSS02.1 (0811405076) and DSS02.2 (0811405079). It executes position loop calculation, SERCOS optical fiber bus communication, machine digital interlock I/O, and synchronizes all axis modules (DEA/DLF) inside the servo rack. Front panel includes DIP switches for SERCOS address configuration, SERCOS fiber port X10 TX/RX, 24VDC digital I/O terminal block and diagnostic LEDs. Widely used in legacy CNC machine tools, metal forming, printing and high-speed packaging automation equipment.

Key Functions

• U1 slot rack master controller for DIAX04 servo rack, mandatory card to boot the whole multi-axis drive system
• SERCOS optical fiber interface (X10 TX/RX), high speed deterministic fiber bus for communication with CNC host controller
• Front terminal block for 24V digital signals: drive enable, E-stop chain, fault reset, ready feedback and machine safety interlocks
• DIP switches for SERCOS node address, operation mode and bus parameter setup
• Coordinate synchronized multi-axis motion for axis modules in U2, U3, U4 slots; distribute position, velocity and torque setpoints
• Enhanced firmware compared to DSS02.1 / DSS02.2: expanded diagnostic functions, improved SERCOS noise immunity and stability
• Onboard diagnostics LEDs for power status, SERCOS link, running status and fault alarm; fault code storage for troubleshooting
• Receives position command from CNC, runs closed-loop position control, transmits setpoint values to each axis power module

Application Scenarios

• Rexroth Indramat DIAX04 multi-axis servo rack, U1 master command board (DSS02.3)
• CNC machining centers, lathes, metal bending and forming machinery
• Printing, paper processing, textile, high-speed packaging production lines
• Spare part replacement and retrofit for legacy DIAX04 installed base

Common Issues & FAQ

• SERCOS communication loss / no CNC connection: Inspect optical fiber cable, swap TX/RX; clean fiber end faces; confirm DIP switch SERCOS address without conflict; check CNC SERCOS master configuration.
• Drive cannot be enabled, no ready signal: Check 24VDC auxiliary power supply for DSS02.3; verify E-stop and safety interlock circuit continuity at front terminal block; read drive fault diagnostic codes.
• Intermittent multi-axis sync error: Check SERCOS fiber attenuation; confirm firmware compatibility between DSS02.3 and axis modules; inspect rack backplane connector pins for oxidation or bending.
• Fault LED illuminated: Retrieve error codes; typical causes: SERCOS timeout, safety I/O interlock failure, firmware mismatch, backplane damage or hardware damage on the module.
• Refurbished / replacement unit note: Install DSS02.3 into U1 slot, set DIP switch SERCOS address same as original unit. Verify firmware compatibility with all axis modules in rack. Perform SERCOS link test, digital I/O interlock test and full machine dry run before putting into production. DSS02.3 can often replace older DSS02.1 / DSS02.2 with firmware verification required.