
Product Description
quick Procurement Facts
- Part Number: 6ES7338-4BC01-0AB0
- Description: 1-Channel 24 V Incremental Encoder / SSI Absolute Encoder Interface, 32-bit Counter, 5 µs Time Base
- Condition: Factory New Sealed in Original Siemens Packaging
- Warranty: 24 months (with full encoder test report)
- Dispatch: 24-hour global shipping from EU/US stock
- Features: 1 × 24 V incremental (A/B/Z, 500 kHz max), 1 × SSI absolute (up to 32-bit, 2 MHz clock), isochronous mode capable
Why 6ES7338-4BC01-0AB0 Remains the Precision Champion in 2025
- Ultra-fast 5 µs counter resolution – perfect for high-speed packaging, printing, and servo positioning
- Simultaneous incremental + SSI support – one module handles both encoder types
- Direct integration into distributed ET 200S racks – saves central rack space
- Still the #1 choice for cut-to-length, flying saw, and rotary knife applications worldwide
Typical Failure Symptoms Driving Immediate Orders
- Counter value drift or sudden jump on high-speed lines
- OB diagnostic: “Encoder signal loss channel 0” or “SSI frame error”
- Z-pulse not detected → positioning offset > 0.5 mm
- Machine crash after years of 24/7 encoder pulses
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens SIMATIC ET 200S |
| Order Number | 6ES7338-4BC01-0AB0 |
| Channels | 1 × Incremental (A/B/Z, 24 V HTL/RS422) + 1 × SSI |
| Max Frequency | 500 kHz (incremental), 2 MHz clock (SSI) |
| Counter Width | 32 bit |
| Time Base | 5 µs |
| Input Voltage | 24 V DC (19.2–28.8 V) |
| Diagnostics | Wire-break, short-circuit, encoder supply monitoring |
| Isochronous Mode | Supported (PROFINET/PROFIBUS DPV1) |
| Power Loss | 2.5 W typical |
| Connection | 2 × 8-pin M12 (encoder + power) |
| Dimensions (W×H×D) | 15 × 81 × 52 mm |
| Weight | 0.08 kg |
| Operating Temp | –25 to +60 °C |
Compatibility & Alternatives
- Direct replacement for: 6ES7338-4BC00-0AB0 (adds higher frequency)
- Modern successor: 1SI module 6ES7138-6AA00-0BA0 (S7-1500/ET 200SP)
- Cross: Beckhoff EL5101 + EL5151 combo, B&R X20CM4810