High-quality, high-reliability voltage-drop adaptor for the MPC4/IOC4T card pairs used by VM600 rack-based machinery monitoring systems. The IOC4T voltage-drop adaptor supports 4 channels, which can be dynamic channels or tachometer (speed) channels. An IOC4T voltage-drop adaptor is installed into a screw-terminal socket (J1 or J2) of an IOC4T card in the rear of a VM600 ABE04x rack.Features4 individually configurable channels for use with IOC4T dynamic channel and tachometer channel inputsReduces a channel's sensor power supply output voltage?27 V input to ?24 V output, ?27 V input to ?18 V output or straight-through connection per channelReduces external circuitry and wiring when IOC4T sensor power supply outputs are connected to third-party front ends