Bosch Rexroth Indramat 0811405076 DSS02.1 Command Interface Module (DIAX04)

Product Description

0811405076 is the material number for Rexroth Indramat DSS02.1 command interface board, a mandatory U1 slot master control card for DIAX04 series servo drive racks. This module is the top-level motion command processor for the servo rack, handling setpoint generation, position loop control, SERCOS fieldbus communication, and digital I/O interface. The photo shows the DSS02.1 card fitted in slot U1 of a DIAX04 multi-axis servo controller chassis, with DIP switches S2 LOW / S3 HIGH, X10 TX SERCOS port and terminal block for digital signals. Widely used for legacy CNC machine tools, printing presses, metal forming and automation production lines.

Key Functions

• Primary motion command and position loop controller, occupies U1 slot (first slot) of DIAX04 rack, required for rack operation
• SERCOS optical fiber interface (X10 TX/RX) for high-speed deterministic motion bus communication with CNC controller
• Digital input/output terminal block for enable, fault reset, ready status, emergency stop and machine interlock signals
• DIP switch configuration for SERCOS node address, baud rate and drive operational mode selection
• Coordinates multi-axis synchronized motion across additional axis modules (DLF, DEA) installed in U2/U3/U4 slots
• Front panel LED status indicators for power, SERCOS link status, fault and operational state; diagnostic fault code reporting
• Processes position setpoints from CNC, executes closed-loop position control and sends torque/velocity commands to axis power modules

Application Scenarios

• Rexroth Indramat DIAX04 multi-axis servo drive rack system, U1 master command card
• CNC machine tools, metal cutting, bending and forming machinery
• Printing, paper processing, textile and high-speed packaging production equipment
• Legacy automation retrofits and spare part replacement for existing DIAX04 installed base

Common Issues & FAQ

• SERCOS link loss / no communication with CNC: Check optical fiber cable integrity and TX/RX polarity; verify DIP switch SERCOS address; inspect fiber connectors for dust/contamination; confirm CNC SERCOS master configuration.
• Drive cannot enable, ready signal missing: Check 24VDC auxiliary supply to DSS02.1; inspect interlock / E-stop chain continuity at the front terminal block; read fault code from drive diagnostic interface.
• Intermittent axis synchronization errors: Check SERCOS fiber attenuation; verify firmware revision compatibility between DSS02.1 and axis modules; inspect rack backplane connector pins.
• Front panel fault LED lit: Retrieve diagnostic error codes; common causes include SERCOS timeout, I/O interlock fault, firmware mismatch, backplane or module hardware damage.
• Refurbished / replacement unit note: After installing the replacement DSS02.1 in U1 slot, set DIP switch SERCOS address to match original configuration, verify firmware version compatibility, perform SERCOS link test, I/O interlock validation and full machine dry run before production operation. Match hardware revision and firmware to the rest of the DIAX04 rack.