The service manual for the Bosch Rexroth VT‑SWKA‑1 analog control card provides features, wiring diagrams, technical data, and maintenance instructions.
This manual describes the VT‑SWKA‑1 analog control card, a board used for generating and processing control‑value signals in hydraulic systems. It covers the card’s features, order codes, functional description, wiring diagram with pin assignment, technical specifications, indicator and adjustment elements, unit dimensions, and engineering/maintenance notes.
The document also explains configuration of differential and current inputs, ramp‑time adjustment, polarity switching, and safety precautions for installation and operation. Wiring diagrams, connector details, and measurement points are provided to aid technicians in setup and troubleshooting.
| Working voltage | 24 VDC ±40% / -20% |
|---|---|
| Power requirement | < 7 VA |
| Current consumption | < 0.3 A |
| Output voltage range | ±10 V |
| Operating temperature range | 0 °C to +50 °C |
| Storage temperature range | -25 °C to +85 °C |
| Weight | 0.15 kg |
| Board dimensions | 100 mm × 160 mm |
| Connector type | 48‑pin DIN 41612 |
Control‑value inputs can be set via potentiometers or external ±10 V signals; differential inputs use ±10 V, and current inputs accept 4‑20 mA (0‑100 %).
When the power supply is active and no error is present, the green LED on the front panel lights, indicating the “Ready” signal.
Ramp‑time can be set to a minimum (< 2 ms) with jumper J2, or extended using an external potentiometer; the setting is visible on the “Ramp‑time ready” status signal.