Step 5 wire sensor(s), Wire do sensors, Directions to wire do sensor(s) – YSI 5500D-1 User Manual

Page 26

YSI 5X00

Step 5 Wire Sensor(s)

Up to four DO sensors and four temperature sensors can be wired to the 5X00.

All sensors are wired to the I/O Board - figure 3.19 and 3.19a. Use location E or F

on metal plate to ground the DO sensor ground/drain wires. (Common lettering

references are used for both 5400 and 5500 models). Follow the wiring instructions

below to ensure proper sensor operation.

YSI probe assembly 5422 has one polarographic DO sensor and one temperature

sensor. YSI probe assembly 5421 has one galvanic DO sensor and one temperature

sensor. YSI probe assembly 5420 has one galvanic DO sensor. The probe assemblies

are shipped bare wire. YSI 5421 and 5422 probe assemblies have five wires. Two

wires are for the DO sensor and are terminated at location H on the I/O board.

Two wires are for the temperature sensor and are terminated at location L on the

I/O board. Terminate the fifth wire (ground/drain wire) to location E or F of metal

plate. The YSI 5420 probe assembly has three wires for the DO sensor and does not

include any temperature sensor wires.

ODO probe assemblies have five wires. Four ODO sensor wires are terminated at

location H. Terminate the fifth (ground/drain wire) to location E or F of metal plate.

Complete directions and wiring diagram are provided at step 4 (5500) - page 52.

The ODO probe is a digital device and includes a temperature sensor.

Wire DO Sensors

Directions to Wire DO Sensor(s)

WARNING: Disconnect external power to the unit before wiring.

1. Perform steps 1 - 4 of 5X00 installation.

2. Open front panel - page 42.

3. Feed DO cable through drilled hole in rubber grommet to location H. The

terminal strip is removable.

CAUTION: Run high and low voltage cables through separate bulkhead and

conduit.

4. Terminate the DO sensor wires for the DO1, DO2, DO3, and/or DO4

system(s). Wire the DO sensor cathode wire to (+) terminals and the DO

sensor anode wire to (-) terminals. Follow the coloring scheme described

below when wiring the DO sensor.

• YSI 5422 polarographic DO sensor wires are green and white.

-Terminate green wire to “A Polarographic”.

-Terminate white wire to “C Polarographic”.

-Terminate bare ground/drain wire to E or F on metal plate.

5400

5500

5400

Notes ground/drain wire termination:

- Install a ring (eyelet) or spade (fork) terminal onto the ground bare wire before

terminating ground wire to E or F.

- Multiple ODO ground/drain wires can be terminated to the same ground

location on the metal plate.

- Return screw at E or F over terminal connection of ground wire.

YSI 5422 polarographic DO/temperature analog sensor cable YSI
Wire Function

Wire label

Cathode (C) (+)

WHITE

Anode (A) (-)

GREEN

Temperature (

There is no polarity for

temperature sensor wires)

RED

Temperature (

There is no polarity for

temperature sensor wire)

BLACK

Ground/drain wire

BARE

• YSI 5420 & 5421 galvanic DO sensor wires are white and black.

-Terminate white wire to “C Galvanic”.

-Terminate black wire to “A Galvanic”.