The Siemens 6AG1350-1AH03-2AY0 is a counter module accepting RS422 differential encoder signals at up to 200 kHz, with a single 32-bit or ±31-bit counter channel. It integrates three 24 V digital inputs and two 0.5 A digital outputs, with a 220 Ω terminating resistor on the RS422 line. The module requires both a 5.2 V ±2% supply for internal logic and a 24 V supply at 1L+ (-3 V) for the I/O side.
The 5.2 V supply tolerance (±2%) sets a tight window; the module will not start if the auxiliary 5 V rail drifts beyond that. The 24 V input for I/O is derived from an external source—a supply meeting EN 50155 is specified. The counter input thresholds (signal 1 from +11 V to 28.8 V) match standard 24 V incremental encoders, and the 220 Ω termination is built in, so no external resistor is needed on the RS422 line. The three digital inputs are 24 V sinks with a typical pull current of 9 mA. Both digital outputs are rated 0.5 A per channel with clocked electronic short-circuit protection.