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1 Scope

These Application Notes are a guide to applying the 
G122-829-003 P-

I

Servoamplifier. These Application Notes

can be used to:

Determine the closed loop structure for your application.

Select the G122-829-003 for your application. Refer also
to data sheet G122-829.

Use these Application Notes to determine your system
configuration.

Draw your wiring diagram.

Install and commission your system.

Aspects, such as hydraulic design, actuator selection, feedback
transducer selection, performance estimation, etc. are not
covered by these Application Notes. The G122-202 Application
Notes (part no C31015) cover some of these aspects. Moog
Application Engineers can provide more detailed assistance,
if required.

2 Description

The G122-829-003 is a general purpose, user configurable,
P-

I

servoamplifier. Selector switches inside the amplifier enable

either proportional control, integral control, or both to be
selected. Many aspects of the amplifier’s characteristics can be
adjusted with front panel pots or selected with internal
switches. This enables one amplifier to be used in many
different applications. The output amplifier is fixed at 4-20mA.
Refer also to data sheet G122-829.

3 Installation

3.1 Placement

A horizontal DIN rail, mounted on the vertical rear surface
of an industrial steel enclosure, is the intended method of
mounting. The rail release clip of the G122-829-003 should
face down, so the front panel and terminal identifications
are readable and so the internal electronics receive a cooling
airflow.

An important consideration for the placement of the module is
electro magnetic interference (EMI) from other equipment in
the enclosure. For instance, VF and AC servo drives can
produce high levels of EMI. Always check the EMC compliance
of other equipment before placing the G122-829-003 close by.

3.2 Cooling

Vents in the top and bottom sides of the G122-829-003 case
provide cooling for the electronics inside. These vents should
be left clear. It is important to ensure that equipment below
does not produce hot exhaust air that heats up the G122-829.

P-

I

Servoamplifier

G122-829-003

MOOG

1

2

3

4

9

10

11

12

5

6

7

8

13

14

15

16

32

31

30

29

24

23

22

21

28

27

26

25

20

19

18

17

feedback

valve

enable

dither

Vs

in posn.

P

I

inp.1

scale

gain

gain

bias

controller

gain

zero

Bottom

vents

Cooling 
airflow

release

Screw
terminals

Top vents

Screw
terminals

DIN rail

17 - 32

1 - 16

clip

Cover
release
tab (4)

DIN rail

Application Notes

Page 1 of 6: C70916 Rev B – 4.10

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