Wiring Information; Pcbs - Xylem YSI IOEM Safety And Installation Manual

1. First complete steps 1-2 under Surface Mount or steps 1-3 under Rail
Mount depending on the type of installation. Note: You may need to
modify the pre-drilled holes in the weather shield depending on the
mounting location.
2. At step 3 (surface mount) or step 4 (rail mount), attach the weather shield
to the surface or rail with the metal plate installed to secure the weather
shield to the surface or rail. Figure 3.4 shows the weather shield installed
for a rail mounted IOEM and REM.
3. Tighten the screws, securing the weather shield.
Figure 3.4

Wiring Information

System components must be wired correctly to ensure reliable performance and
accurate functionality. Directions are provided in this section for wiring all IOEM
and REM components and peripheral devices. Proper Earth Ground is required to
ensure safe operation-see Wire and Ground IOEM and REM, page 33. Power
mains to be fed by a Listed/Certified 15/20Amp Breaker for SC protection.

PCBs

There is a single pcb inside IOEM-4 and REM enclosures. IOEM-8 expansion
modules have an additional pcb providing for an additional 4 I/O channels. All
components including power, network, RS232 communication, inputs/outputs
(IOEM) and relay outputs (REM) are wired to one board. There is a metal plate
covering the PCB(s). The metal plate is labeled with letters. These letters correspond
to a label, affixed to the inside of the front panel which identifies wire termination
IOEM/REM Safey and Installation Guide
Installation and Wiring
28
locations. IOEM and REM ground wires (also called drain wires) are terminated
to the metal plate as well.
The front panel must be open when wiring system components, peripheral devices
and RS232 communication cabling. See Accessing the I/O and REM Board - page
32. It is recommended that some system configuration and testing be done in
conjunction with hardware installation. This ensures that peripheral devices are
wired correctly. Refer to Chapter 4, "Configuring IOEM and REM Systems, " page
70, for references to 5X00 instrument user manuals for proper configuration of
all IOEM and REM instrument systems.
WARNING: Follow all safety information and local electrical codes when
wiring IOEM and REM system components and peripheral devices
wire gauge should be determined based on voltages and wire/cable length. Incor-
rect wiring can result in damage to you or to the equipment. Improper wiring
can also result in ground loops.
AVERTISSEMENT : suivez toutes les consignes de sécurité et les codes élec-
triques en vigueur lors du câblage des composants du système IOEM and REM
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'équipement. Un câblage incorrect
peut également entraîner des boucles de mise à la terre.
IOEM/REM Safey and Installation Guide
Installation and Wiring
. Proper
29