Features:
- Thirty-two isolated digital outputs support dense S7-400 field-control layouts.
- Electronic short-circuit protection supervises each 24 V DC switching channel.
- Grouped output architecture supports parallel operation within documented channel groups.
The current order configuration is the SM 422 assembly with 32 outputs rated for industrial 24 V DC circuits. Its official packaging data and order identity are retained for procurement matching.
Within an S7-400 station, the module translates controller commands into field switching for relays, contactors, indicator lamps and solenoid-operated devices. The isolated channel groups help separate load circuits from the PLC backplane.
Installation planning should confirm the front connector, L+ group wiring, permitted load frequency and cabinet heat calculation. Inductive loads require particular attention to the documented shutdown-energy limitation.
Availability is subject to phase-out stock and exact order-number verification.
Verified resources for Siemens 6ES7422-1BL00-0AA0:
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Controls banks of 24 V DC relays and contactors in process or machine automation panels.
- Operates solenoid valves and signal lamps where many isolated outputs are required in one S7-400 slot.
- Supports retrofit maintenance of installed S7-400 systems that retain the original SM 422 channel map.
- Clocked electronic protection limits damage from output-circuit shorts while preserving diagnostic separation.
- The typical protection response range is defined for channel-level fault handling and service checks.
- Inductive shutdown voltage is limited to control stored load energy during de-energization.
- The module mounts in the SIMATIC S7-400 rack and uses the matching front connector for field wiring.
- Parallel outputs are permitted only within the same documented potential group.
- L+ field power should be isolated and verified before a connector or module is removed.
- The packaged order unit measures 23.30 × 30.00 × 3.80 cm and has a net mass of 0.774 kg.
- Cabinet design must provide the environmental and clear-space conditions specified for the S7-400 station.
- Field voltage must remain within 20.4–28.8 V DC for reliable switching operation.