Description
Direct connection of SSI encoders to the K-bus system is facilitated by the BECKHOFF KS5051 1-channel SSI encoder interface terminal. This module provides a dedicated interface for absolute positioning systems, receiving differential RS422 signals and supplying them to the higher-level controller via the process image. The KS5051 features a pluggable wiring level, making it highly serviceable for rapid module replacement without disconnecting field wiring.
Operating as a bidirectional unit, this bus terminal supports data transmission rates up to 1 MHz and accommodates variable serial input widths of up to 24 bits. It integrates 500 V electrical isolation between the internal K-bus and the field potential to protect sensitive processing electronics from electrical surges in harsh environments.
Features
- 1-channel SSI encoder interface with bidirectional communication.
- Pluggable connection level for fast, tool-free terminal replacement.
- Supports differential signal transmission based on the RS422 standard.
- 500 V electrical isolation between K-bus and field potential.
- Compact 12 mm housing width designed for DIN rail mounting.
Applications
- Industrial motion control and positioning feedback systems.
- CNC machining centers and robotic manufacturing cells.
- Heavy machinery, materials handling, and packaging lines.
Technical Specifications
| Manufacturer |
BECKHOFF |
| Part Number / Model |
KS5051 |
| Technology |
SSI encoder interface |
| Number of Channels |
1 |
| Encoder Connection |
Binary input: D+, D-; Binary output: Cl+, Cl- |
| Power Supply |
5 V DC via power contacts (KL9505) |
| Current Consumption (K-Bus) |
typ. 75 mA |
| Current Consumption (Internal) |
typ. 85 mA (without encoder) |
| Encoder Supply Voltage |
5 V DC |
| Data Transfer Rates |
1 MHz |
| Serial Input Width |
24 bit (variable) |
| Data Direction |
Bidirectional |
| Signal Type |
Difference signal (RS422) |
| Electrical Isolation |
500 V (K-bus/field potential) |
| Bit Width in Process Image |
Input/output: 2 x 16 bit data, 2 x 8 bit control/status |
| Operating Temperature |
0 to +55 degC |
| Storage Temperature |
-25 to +85 degC |
| Relative Humidity |
95 %, non-condensing |
| Vibration/Shock Resistance |
Conforms to EN 60068-2-6 / EN 60068-2-27 |
| EMC Immunity/Emission |
Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Protection Rating |
IP20 |
| Wiring Type |
Spring actuation by screwdriver (Pluggable) |
| Connection Cross-Section (Solid) |
0.08 to 1.5 mm² (AWG 28 to 16) |
| Connection Cross-Section (Fine-wire) |
0.14 to 1.5 mm² (AWG 26 to 16) |
| Stripping Length |
9 to 10 mm |
| Dimensions (W x H x D) |
12 mm x 100 mm x 68 mm |
| Weight |
0.08 kg |
Installation Guidelines
- Mount the module onto a standard 35 mm DIN rail (conforming to EN 60715) until the lock snaps firmly in place.
- Ensure all electrical contacts are clean and dry before side-by-side mounting using the integrated double slot and key connection.
- Always supply the 5 V DC power via the power contacts from an upstream power supply terminal, such as the KL9505.
- Use shielded twisted-pair cables for the RS422 encoder connections to guarantee signal integrity in environments with high electromagnetic interference.
Compliance and Certifications
- CE, UL
- ATEX (Ex marking: II 3 G Ex nA IIC T4 Gc)