POWER PLANT- ISOLATED SHUNT AMPLIFIER MODULES(ISAM)

Isolated Shunt Amplifier Module (Isam)

 Introduction

A standard MiniCSU system only accepts Hall-effect current transducers with full scale output of ± 4V. In situations where current shunts are used in place of Hall-effect current transducers, the ISAM, or Isolated Shunt Amplifier Module can be used. It provides optical isolation and converts the ± 75mV current shunt full scale signal to the required ± 4V full scale signal. 
Electrical Specification

Power Supply                         ± 14Vdc to ± 16Vdc

Signal Input                             ± 75mV

Input Impedance                     650 W

Absolute Max Input                 ± 6V

Signal Output                          ± 4V (@ ± 75mV input)

Output Impedance                  1 kW

Output Short Circuit                Indefinite

Output Error                            Typically 0.1% of 4V FSD

Output Zero Offset                 Typically 0.1% of 4V FSD

Physical Specification

Board Dimensions                  approx. 116mm x 66mm

Signal Input Connector            2 pin male header 5.0mm pitch

Output Connector                   4 pin male header 2.54mm pitch

Input connections                    Shunt +, Shunt -

Output Connections                +15V, -15V, VOUT, GND

System Setup

The ISAM should be located as close as possible to the shunt, ideally within 1~2 meters of the shunt. It should also be mounted securely in a dry, dust free environment. The shunt should be wired up to 2 way Weco 5.0mm screw connector , polarity is shown below:

	To Shunt

 

Wire up a Molex 22-01-2045 Female connector with the following connections:

 

The other side of the 4-way cable can be connected either to the MUIB or MUIB2.