The 6AG1321-1FH00-7AA0: Input response time is symmetrical: 25 ms typical for both 0→1 and 1→0 transitions. The module draws 29 mA from the 5 V DC backplane bus plus approximately 6.5 mA per input at 120 V AC or 16 mA at 230 V AC.
Sourcing and Lifecycle
Sourcing is straightforward: this is a stocked catalog item for major Siemens distributors. Lead time is quoted to order against an RFQ; no unusual allocation or scarcity applies. The module requires a 20-pin front connector (sold separately).
Installation Notes
Status indication: each channel has a green LED that illuminates when the input is in the "1" state. The module does not support hardware interrupts or diagnostic alarms, so fault detection must be handled in the CPU logic.