Wiring Methods For Analog Modules; Analog Input Module Wiring Methods - GE 90-30 PLC Series Installation And Hardware Manual

Figure 7-5. Example of Series 90-30 Analog Current Output Module

Wiring Methods for Analog Modules

Twisted, shielded instrumentation cable is strongly recommended for analog module input or
output signal connections. Proper grounding of the shield is also important. For maximum
electrical noise suppression, the cable shield should only be grounded at one end of the cable. For
Input modules, ground the end that is in the noisiest environment (which often is at the field device
end). For Output modules, ground at the module end. See GFK-0898, Series 90-30 PLC I/O
Module Specifications, for more shield grounding information.

Analog Input Module Wiring Methods

Correcting electrical noise problems can sometimes be a trial-and-error routine. However, in
general, it is generally best to ground the cable shield as close to the source of the noise as possible,
which is usually at the device end. In troubleshooting noise problems, sometimes it is beneficial to
experiment with the shield grounding point location. Remember, the cable shield should be
grounded at one end only. Also, it is best to keep the length of stripped cable leads as short as
possible to minimize the length of unshielded conductors that will be exposed to the noisy
environment. See the Series 90-30 PLC I/O Module Specifications Manual, GFK-0898 for
additional details.
GFK-0356Q Chapter 7 Input/Output Modules
Removeable Terminal
Board
Lens Cap
OK
Module OK LED
OUTPUT
Module Type
ANALOG
CURRENT
VOUT1
1
VOUT2
2
A1
IOUT1
1
3
A2 Removeable
IOUT2
Insert
4
A3
RTN1
5
A4 2
RTN2
6
GND
7
GND
8
JMPV1
9
Connection
JMPV2
10 Diagram
DEF0
11
12 *
13
0-20mA
14
CH1
*
15
16
17 * +
24V
18
-
19
CH2
*
20
0-20mA
Module Catalog
44A729182-021R01
No.
FOR USE WITH
IC693ALG391
7
Hinged Cover
7-9