Description
Generating analog control signals within the Beckhoff I/O system, the KS4031 bus terminal delivers a high-precision, single-channel output ranging from -10 to +10 V. This specialized analog output terminal is built with pluggable wiring levels, simplifying installation and maintenance in dense control cabinets. Operating via the standard K-bus, the module isolates control-side logic from field-level actuator signals up to 500 V, providing superior noise immunity and protection for upstream PLC and industrial PC controllers.
Features
- Single-channel analog output with a bipolar signal range of -10 V to +10 V.
- High-resolution 12-bit signal conversion for precise control loop actuation.
- Pluggable connection technology (KS series design) allowing fast wiring swaps without disconnecting field cables.
- Complete galvanic isolation of 500 V between the internal K-bus and the field signal.
- Short-circuit proof output circuitry with a minimum load resistance of 5 kOhm.
- Diagnostic-friendly interface with optional control and status bytes alongside 16-bit output data in the process image.
Applications
- Proportional valve control and hydraulic actuator positioning.
- Speed reference setpoint transmission for variable frequency drives (VFDs).
- Analog calibration reference in plant engineering and machine manufacturing.
- Signal conversion in HVAC and building automation control cabinets.
Technical Specifications
| Manufacturer |
Beckhoff |
| Part Number / Model |
KS4031 |
| Number of Outputs |
1 |
| Signal Voltage |
-10 to +10 V |
| Resolution |
12 bit |
| Conversion Time |
approx. 1.5 ms |
| Output Error |
< ±0.1% (relative to end value) |
| Load Impedance |
> 5 kOhm (short-circuit proof) |
| Electrical Isolation |
500 V (K-bus / signal voltage) |
| Current Consumption K-bus |
typ. 75 mA |
| Bit Width in Process Image |
Output: 1 x 16-bit data (1 x 8-bit control/status optional) |
| Connection Technology |
Pluggable wiring (spring actuation) |
| Connection Cross-Section |
Solid/Stranded: 0.08 to 1.5 mm², Fine-wire: 0.14 to 1.5 mm² |
| Connection Cross-Section AWG |
AWG 28 to 16 |
| Stripping Length |
9 to 10 mm |
| Dimensions (W x H x D) |
12 mm x 100 mm x 68 mm |
| Weight |
0.085 kg |
| 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 |
| Ex Marking |
II 3 G Ex nA IIC T4 Gc |
| Approvals and Markings |
CE, UL, ATEX, DNVGL |
Installation Guidelines
- Mount the terminal on a standard 35 mm DIN rail (conforming to EN 60715) with the locking mechanism engaged.
- Ensure that electrical power is entirely switched off before connecting or separating the pluggable wiring level.
- To wire the terminal, actuate the internal spring clamp by pressing a standard flat-blade screwdriver into the release slot.
- Maintain adequate ventilation clearance above and below the terminal block assembly to comply with the 0 to +55 degC operating envelope.