YSI 6500 Environmental Process Monitor - Manual (Page 15)

Installation Section 2
WARNING!
A qualified electrician should perform wiring.
Do not make connections while power is applied. Disconnect power before proceeding.
This particular phase of the installation will vary considerably depending on the distance between
the sonde and monitor and on which outputs you use in your particular configuration. In the
simplest configuration in which the sonde is connected using the sonde cable and neither the relay
outputs nor the 4-20 mA current loop outputs are used, only AC power wiring is required. The
sonde connects to the monitor by the MS-8 sonde cable connector, which is pre-wired. The end
connection of the cable is a military-style 8-pin connector (MS-8). If, however, the monitor is
more than the length of the sonde cable away from the sonde and either of the outputs is wired to
alarms or a SCADA system, additional wiring is required. Below are wiring instructions for all
parts of the 6500 Environmental Process Monitoring system.
The 6500 Monitor has one MS-8 connector and three conduit openings in the bottom of the
monitor housing which will accommodate ¾ inch conduit fittings. From a front view, the 2
conduit openings on the left are for the four relay outputs and the eight 4-20 mA outputs. The
conduit opening on the right should be used for the AC power supply cable. The MS-8 connector
is used to interface with the sonde cable in the close range system layout, or in the long distance
wiring layout, the optionally-supplied 6 foot (1.8 m) patch cable (YSI #6507) to the #6508
Junction Box. Refer back to Figure 3 to review the configuration options.
IMPORTANT!
It is essential that all sensor wiring be run in a separate conduit from power wiring.
2.5.1 SONDE CABLE CONNECTIONS (SDI-12
COMMUNICATIONS LINK)
The sonde is equipped with a detachable or non-detachable cable. This connector plugs directly
into the 6500 Monitor when the 6500 Monitor is within range of the sonde cable. This
configuration is shown in
Figure 2.
In remote sonde installations the 6500 Monitor uses a standard MS-8 connection to interface with
the 6-ft (1.8 m) Patch Cable (YSI #6507) that will run to the #6508 Junction Box. The customer
is advised to supply rigid conduit and 18 AWG or heavier shielded multi-conductor cable to
connect between the local junction box and the remote 6502 Breakout Box at the sonde
installation site. The cable from the Junction Box should be landed to TB-1 in the Breakout Box.
The MS-8 connector for sonde hookup is pre-wired to TB-2 and TB-3.
YSI Incorporated 6500 Environmental Process Monitor 11