Hach ORBISPHERE 410 Manual Básico Del Usuario página 14

4.7.4 Measurement board
The different measurement boards for the EC and TC sensors are illustrated in
Figure 13. The type of board is easily identified by the color of the J8 connector. For EC boards this
connector is colored orange, and for TC boards it is colored black.
It is extremely important that sensors are connected to the correct measurement board. Connecting a TC sensor
to an EC measurement board (and vice versa) will cause irreparable damage to the measurement board.
Figure 12 EC measurement board
Figure 14 Connector J7
Connector J7 (inputs & outputs)
The numbers listed below refer to the 16 available J7 connections (from left to right) in
Measurement alarms relays:
1. Common
2. Output relay 1
3. Output relay 2
4. Output relay 3
Digital inputs:
9. EC sensor: Not used
9. TC sensor: Hold input. To deactivate the sensor from a PLC system, connect
a dry contact between J7.9 and J7.12
10. to 11. Not used
12. Digital GND
13. to 16. Not used
14 English
N O T I C E
Figure 13 TC measurement board
Figure 15 Connector J8
Figure 12 and
Figure 14.
Analog current (or voltage)
outputs:
5. Analog GND
6. Output 1
7. Output 2
8. Output 3