The Siemens 6AG1322-1BH01-2AA0 is a SIPLUS digital input module from the ET 200SP family, hardened for railway and mobile applications. It operates from -40 °C up to 70 °C ambient, certified to EN 50155 sections 4, 5, and 12 (T1, Category 1, Class A/B). That means it holds its ratings across the full thermal envelope—no derating surprises at -40 °C or +70 °C.
Input response times are 100 µs (0→1) and 500 µs (1→0) maximum—fast enough for encoder edges or short-pulse capture. The electronic short-circuit protection (response threshold 1 A) per channel saves external fusing for most wiring faults. Cable length: 1 000 m shielded, 600 m unshielded. Signal '1' threshold: L+ (-0.8 V) at 24 V DC. Power dissipation is 4.9 W typical. Module uses a 20-pin front connector; width 40 mm.
The module carries UL (File E239877), CE, KC, EAC (formerly Gost-R), and RCM (formerly C-TICK) approvals. Isolation tested at 500 V DC between channels and to ground. For a capex project buyer: all required compliance documentation (UL, CE, EN 50155 declaration) is available from Siemens support under the order code 6AG1322-1BH01-2AA0.