Internal Overview - SKF On-line System WVT User Manual

Internal Overview

Analog Input Signals
The SKF Multilog WVT has four pairs of channel inputs, each pair comprising a dynamic
accelerometer input and a process temperature input. It is designed to operate with
low-power dual output sensors which provide a dynamic vibration signal and a static
temperature signal. Power to the sensor is 3.3 VDC.
Tachometer (or Tacho) Inputs
In addition, there are two tacho inputs. Note that only one tacho input can be used at a
time. There is an isolated input which is intended to take a signal from an existing
system output (which has its own power and ground – hence the requirement for
isolation). The second interface is for a Namur type sensor. This is a low-power
inductive device which is powered directly from the SKF Multilog WVT unit.
Battery Power / External Power
The SKF Multilog WVT unit can be powered by internal batteries or external power.
Refer to the section on Power Sources later in this chapter for details.
The following photo shows the interior of the SKF Multilog WVT with important
connectors and components labeled.
SKF Multilog On-line System WVT
User Manual
Hardware Overview
Internal Overview
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