Product Description:

The VT-MSPA 1-1-12a-V0-0 is a compact electronic drive module from Bosch Rexroth Indramat in the VT-MSPA Drives series. It adapts a 24 V DC control supply to the current levels required by industrial solenoid loads, allowing precise actuation of field devices in automated machinery. By presenting dedicated input and output terminals, the unit occupies minimal panel space while contributing current regulation and protection functions to low-voltage automation circuits.

Its field connections are arranged on 12 spring-type terminals, giving quick clamp access for signal and power wiring. The module expects a stable bus voltage of 24 V DC, and conductors may be routed up to 50 m (1.5 mm²) without signal loss. The housing meets the IP20 protection class, so it must reside inside a closed electrical cabinet. Under worst-case demand, the electronics draw <48 W, which helps with power-supply sizing and cabinet thermal management. Input circuitry presents a 200 kΩ voltage resistance and a 100 Ω current load resistance, ensuring compatibility with standard PLC analog outputs. Minimum load impedance of 1000 Ω prevents overcurrent on voltage-driven channels, and residual ripple is limited to 2.5 Vpp for consistent actuator behavior.

Operating requirements remain modest: total current consumption stays below <2 A, and inrush peaks under 4 A before settling. A safety fuse rated at 3.15 A time-lag should be installed on the supply line to isolate faults. The output stage can deliver 2.7 A of regulated solenoid current, reaching its target in <1 s after power is applied, so machine sequences start promptly. An upper voltage limit of 36 V protects semiconductors, while the 0.14 kg assembly adds little weight to the DIN rail.