Hach-Lange ORBISPHERE 510_51x Basic User Manual - Manual (Page 12)

Connector J8 (sensor)
The numbers listed below refer to the 10 available J8 connections (from left to right) in
Figure 8 . The
colors indicated are the wire colors in the sensor cable.
Note: Remember, this connector is colored orange for EC sensors and black for TC sensors.
A1100 EC sensor 31xxx EC sensor 31xxxS smart EC
sensor TC sensor Sensor
cable
wall or
panel LEMO
10 cable
portable
1. Guard electrode Guard electrode Guard electrode GND for power Yellow Brown
2. RS485A+ Not used I2C-SCL V2 signal Pink Red
3. Thermistor A Thermistor A Thermistor A Solenoid Grey Orange
4. Anode electrode Anode electrode Anode electrode Relay coil Red Yellow
5. RS485B Not used I2C-SDA +12V power Purple Green
6. Thermistor B Thermistor B Thermistor B +24V power White Blue
7. GND Not used GND V3 signal Black Purple
8. + 5V Not used + 5V GND for signal Green Grey
9. Cathode electrode Cathode electrode Cathode electrode -5V power Blue White
10. Not used Not used Not used Temperature Brown Black
Measurement alarm relays
The three output relays are located on the measurement board.
They can be individually configured to Normally Open (NO) or to Normally Closed (NC) by
physically moving the jumper on each relay. The illustration is for the EC measurement
board (the positions are different for the TC measurement board):
• Upper relay is set to NC
• Middle relay is set to NO
• Lower relay is shown with no jumper
Note: For all measurement boards, J4 is relay 1, J5 is relay 2 and J6 is relay 3
Sensor installation
EC sensors
For EC sensor installation, servicing, and maintenance ensure you follow the instructions in the
Sensor Installation and Maintenance manual that was supplied with the instrument.
TC sensors
For TC sensor installation, servicing and maintenance ensure you follow the instructions in the TC
Sensor Installation and Maintenance manual that was supplied with the instrument. Pay particular
attention to the installation and connection of the purge gas supply.
N O T I C E
Do not place the TC sensor into a liquid sample until a constant supply of dry purge gas has been connected, as
liquid could condense inside the measuring chamber and cause damage to the thermal conductor chip.
To ensure the continuation of purge gas while the sensor is in contact with the sample, it is highly
recommended to use a backup purge gas cylinder with an automatic changeover valve that activates
when the first cylinder is empty.
The use of an ORBISPHERE Model 29089 gas regulator (or similar) is also recommended to deliver
a constant, pressure regulated supply of dry purge gas to the sensor, filtered to 40 μm.
12 English