ATI Industrial Automation 9121-VB4-T Discrete Tool Module

The ATI 9121-VB4-T Discrete Tool Module is a compact tool-side I/O module designed for ATI Tool Changer systems, delivering eight tool-pass-through signals and a dedicated 0–99 Tool-ID to identify each tool independently while the changer operates. It uses a 19-pin Amphenol connector plus a 19-pin block for the tool interface, and it supports a Tool Stand Interlock on the tool side to ensure safe tool changes; Ready-to-Lock (R1 and R2) and built-in Lock/Unlock sensor inputs are provided to coordinate tool retention and release. The module’s customer interface uses a 19-pin Amphenol MS3102E22-14S female connector, and ATI describes the VB4-T as a compact design package suitable for tight automation envelopes. Weighing about 1.3 lb (0.6 kg), the VB4-T is the eight-pass-through variant in ATI’s VB4 tool-module family, intended to integrate with ATI's broader tool-changer ecosystem to route discrete I/O, support tool-ID assignment, and enforce interlocks during tool changes, making it well-suited for robotics workcells and automated assembly lines that require reliable, tool-specific signaling and safe changeover control.