VM1*S Yokogawa Multipoint Analog I/O Card

The Yokogawa VM1*S, also cataloged as the VM1 Multipoint Analog I/O Card, operates as a dedicated hardware component for simultaneous analog signal acquisition and generation within CENTUM VP and CENTUM CS 3000 platforms.

Hardware Specifications

Channel Isolation & Loop Protocol Infrastructure

The VM1*S card integrates galvanically isolated analog signal paths across its 16 total channels to isolate internal system buses from field side transients. This channel isolation structure prevents ground loops across the 8 analog input and 8 analog output loops, preserving signal linearity for attached 4-20 mA HART loop protocol field devices. High-density input and output conversion stages maintain analog accuracy across parallel loop runs without crosstalk interference.

Frequently Asked Questions

Q: How does the VM1*S manage system backplane power distribution across its input and output channels?

A: The card draws a maximum of 3.5 W directly from the rack backplane power supply, distributing internal regulated DC rails across both the 8 input conversion circuits and 8 output driver stages.

Q: Can the VM1*S card be hot-swapped during active controller rack operation?

A: Module removal or replacement during active operation depends on system redundancy settings; online replacement requires following controller slot deactivation procedures to prevent loop interruption or backplane bus faulting.

Field Installation Guidelines

Insert the VM1*S card vertically into the assigned CENTUM VP or CS 3000 node slot, sliding the module along the chassis card guides until the backplane multi-pin connector is fully seated. Fasten the front panel retention screws to secure physical mounting and establish low-impedance frame ground continuity. Route all 4-20 mA input and output cabling through shielded twisted pairs, connecting cable shields to a dedicated cabinet earth bar to prevent external noise coupling.