G123-815A001 G123-825-001 Buffer Amplifier

1 scope
These application notes are a guide to applying the G123-815Buffer Amplifier. They tell you how to install,

connect andadjust the Buffer Amplifier. They do not tell you how to designthe closed loop system in which it is used.
2 Description
The G123-815 Buffer Amplifier interfaces between standardPLC analogue input and output modules, on one side,

anda position transducer and a Moog valve, on the other.It simplifies the use of a PLC in closing position loops.The

Buffer Amplifier solves the common problem of the+10V PLC output being incompatible with the valve driverequirements.

It also provides digital noise filtering for the valvesignal and noise filtering for the position transducer signal.For a more detailed description, see Moog brochureG123-815E01.01.

3.1 Placement
A horizontal DlN rail, mounted on the vertical rear surface ofan industrial steel enclosure, is the intended method ofmounting.The

rail release clip of the G123-815 should facedown, so the front panel and terminal identifications arereadable and so the internal

electronics receive a coolingairflow, An important consideration for the placement of themodule is electro magnetic interference

(EMl) from otherequipment in the enclosure. For instance, vF and AC servodrives can produce high levels of EMl. Always

check the EMCcompliance of other equipment before placing the G123-815close by.
3.2 Cooling
Vents in the top and bottom sides of the G123-815 caseprovide cooling for the electronics inside. These vents shouldbe left clear. lt is

important to ensure that equipment belowdoes not produce hot exhaust air that heats up the G123-815