Description
⚙️ Product Introduction
The 0 811 405 140 is a Bosch Rexroth analog positioning controller from the VT-MACAS series. Its Bosch designation is VT-MACAS-500-10/V0/I, with the /I version using a 4–20 mA current input. Bosch documentation identifies this version as a standard controller for valves with on-board electronics and without an integrated valve amplifier function.
The module is designed for hydraulic position-control applications. It compares a command/setpoint signal with a feedback signal and processes the difference for position or velocity control. The module can be used with Bosch Rexroth hydraulic systems where the corresponding valve and feedback configuration are compatible.
🔧 Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Bosch Rexroth |
| Model | 0 811 405 140 |
| Alternate Model | VT-MACAS-500-10/V0/I |
| Series | VT-MACAS |
| Product Name | Analog Positioning Controller |
| Product Type | Analog Hydraulic Control Module |
| Command Input | 4–20 mA |
| Feedback Input | 4–20 mA |
| Supply Voltage | 24 VDC nominal |
| Dimensions | Approx. 86 × 110 × 95 mm |
| Condition / Status | New – Open Box |
⚙️ Control & Hydraulic Application
The VT-MACAS module is intended for analog position-control applications. Bosch documentation specifies a 24 VDC nominal supply, maximum current consumption of approximately 200 mA, and 4–20 mA command and feedback signals for the /I version.
The controller can operate in position-control or velocity-control configurations. Bosch documentation also identifies adjustable parameters including zero point, gain, ramp characteristics, and feedback-related settings.
The module is designed for mounting on a DIN rail and uses a connector/terminal connection arrangement. The documented dimensions are approximately 86 × 110 × 95 mm.
🛠️ Installation & Maintenance
• Verify the complete material number 0 811 405 140 before replacement.
• Confirm that the existing system uses the 4–20 mA version.
• Check both command and feedback signal wiring.
• Verify the 24 VDC supply before energizing the module.
• Confirm the hydraulic valve and feedback device are compatible.
• Inspect terminal connections and the DIN-rail mounting arrangement.
• Check zero-point and gain settings during commissioning.
• Perform controlled position and feedback tests before returning the hydraulic system to operation.
⚠️ Compatibility Note
Although many marketplace listings describe 0 811 405 140 as a “Proportional Amplifier Module,” Bosch’s technical documentation identifies it specifically as VT-MACAS-500-10/V0/I, an analog position controller without a valve amplifier function. Therefore, it should not automatically be substituted for a Bosch Rexroth proportional valve amplifier simply because the product descriptions use similar terminology.
❓ FAQ
Q1: What is Bosch Rexroth 0 811 405 140?
It is a VT-MACAS analog positioning controller, model VT-MACAS-500-10/V0/I, designed for hydraulic position-control applications.
Q2: What input signal does this version use?
The /I version uses a 4–20 mA command input. Its feedback input is also specified as 4–20 mA.
Q3: What is the supply voltage?
The documented nominal supply voltage is 24 VDC, with an operating range specified by the Bosch documentation.
Q4: Is 0 811 405 140 a valve amplifier?
The marketplace description may call it a proportional amplifier, but Bosch documentation identifies the unit as a position controller and states that the standard version is without a valve amplifier function.
Q5: What is the alternate Bosch Rexroth designation?
The corresponding designation is VT-MACAS-500-10/V0/I.
Q6: Can it be used as a direct replacement?
Only after matching the material number, input/feedback signal type, hydraulic valve configuration, supply voltage, and control-system wiring.
⭐ Recommended Related Bosch Rexroth Models
- Bosch Rexroth 0 811 405 139 — VT-MACAS-500-10/V0
- Bosch Rexroth VT-VRPA1 Series
- Bosch Rexroth VT-VRRA1 Series
- Bosch Rexroth VT-VACAP Series
- Bosch Rexroth VT-VACAI Series
- Bosch Rexroth VT-VSPA1 Series
- Bosch Rexroth VT-SSPA1 Series
- Bosch Rexroth VT-KACAB Series
- Bosch Rexroth VT-MSPA1 Series
- Bosch Rexroth VT-MSPA2 Series
These are related Bosch Rexroth hydraulic control and amplifier families. They are not automatically interchangeable with 0 811 405 140; the exact electrical and hydraulic configuration must be matched before replacement.
