TM 5-3895-374-24-2
955-257
1.5 WIRING
Successful operation begins with proper installation. Good installation requires not only that good wiring practices be
followed but also that reasonable protection be provided against external electrical influences that could interfere with
controller operation. In addition all wiring must conform to applicable local and national codes. The controller should be
wired with an external power disconnect and fuse.
1.6 NOISE SUPPRESSION
The primary source of electrical interference (noise) that can impact any digital device is inductors most commonly found
as coils and windings in solenoids, relays and transformers. It is important to suppress any potential for electrical noise at
its source to ensure reliable controller operation. Specifically this means putting noise suppression devices across the
terminals of all inductors in your system.
If you do not have the necessary components available, they may be purchased locally or in kit form from the factory.
ITEM
MAX. AC
RATING
KIT
RC
KIT
240
VAC
O.luF/220 ohms
1821
- 100
MOV
KIT
130
VAC
35
Joules
1821
- 98
MOV
KIT
250
VAC
70
Joules
1821
- 99
When wiring to the controller, twisted pair with insulated shield is recommended for all signal leads. Make sure the shield
is grounded ONLY at the controller - use the AC power ground terminal 8. Be sure to protect against ground loops in
signal leads, shields and all other input and output wiring.
Low level signal leads and high level power cables must not be run in the same conduit or cable trays. Care when wiring
means better system reliability.
ECLIPSE INSTRUMENTATION DIVISION
page 3 - 1083
