5X00 Bulkhead Fittings; Accessing The I/O Board; Open Front Panel To Access I/O Board; Close Front Panel - YSI MultiDO 5400 User Manual

AVERTISSEMENT : suivez toutes les consignes de sécurité et les codes électriques
en vigueur lors du câblage des composants du système 5X00 et des appareils
périphériques. Le calibre correct des câbles doit être déterminé en fonction des
tensions et de la longueur des câbles/fils. Un câblage incorrect peut entraîner des
blessures et endommager l' é quipement. Des boucles de mise à la terre peuvent
également être provoquées par un câblage incorrect.

5X00 Bulkhead Fittings

Five bulkhead fittings [5@ 3/8"(.9525cm), 2 @ 3/4" (1.905cm) and 3@ 1/2" (1.27cm)]
located at the bottom of the 5X00 enclosure provide watertight connections for
5X00 system component wiring. Rubber grommets must be "pushed out" of the
compression fitting housing and drilled for wiring installation. The drill bit diameter
should be slightly smaller than the wire diameter so that a watertight seal can be
made. Rubber grommets can be frozen (put in a freezer for 1 hour) and then easily
drilled to the required diameter. Some pre-drilled rubber grommets are supplied
with the 5X00.
Figure 3.13

Accessing the I/O Board

The I/O board is accessible when the 5X00 front panel is removed. The letters on
the metal plate, which is attached to the lower board assembly, identify ground wire
termination locations and pluggable terminal strip locations on the I/O board. Letters
on the metal plate correspond to the wiring diagram located on the inside of the top
panel - figure 3.14. A ribbon cable connects the display board (mounted in the top
panel) to the I/O board. When the 5X00 top panel is removed, a lanyard protects
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against stress on the ribbon cable. See Open Top Panel to Access I/O Board - page 41.
Figure 3.14

Open Front Panel to Access I/O Board

WARNING: Disconnect external power to the unit before doing any wiring.
AVERTISSEMENT : déconnectez l'alimentation externe de l'unité avant d' e ffectuer
un câblage quelconque.
1. Loosen the 4 mounting screws connecting the front panel to back enclosure.
Captive screws remain in front panel after loosening.
2. Carefully lift the 5X00 front panel from the back enclosure. The front
panel should be placed to the left of enclosure. Allow the lanyard to hold
the weight of the front panel. The rubber gasket seated in the front panel
should remain in the front panel lid.

Close Front Panel

1. Verify all installed components and peripheral equipment have secure
connections and that there are no bare wires that could cause a short inside
the enclosure.
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