What it is — ET 200SP relay output slice
This 6ES7132-6HC70-0BU0 is a digital output module for the Siemens ET 200SP distributed I/O system, carrying three relay changeover contacts each rated for 5 A continuous at 24 V DC or 230 V AC. Each channel is a non-floating changeover relay, and the module supports both current-sinking and current-sourcing wiring.
Key ratings — what they mean for fit
The 5 A rating holds all the way to 60 °C ambient, so no derating curve to manage within the enclosure—common on semiconductor outputs but rare for a relay module in this footprint. Diagnostic alarm and channel status green LEDs (, plus a green/red DIAG LED) make fault isolation straightforward without needing software. Shielded cable runs up to 1 000 m; unshielded up to 200 m. The module draws 1.4 W typical and occupies 20 mm on the DIN rail—identical to the standard ET 200SP electronic module width.
Mounting and wiring — base unit matters
This module mates only with a BU type U0 base unit; the same base supports 2-wire and 3-wire connections. Automatic encoding ensures the base unit recognizes the module type on insertion. Redundancy capability is built in, and the module can be hot-swapped with power on if the base unit supports it.