Measurement Board - Hach ORBISPHERE 51 Series User Manual

3.6.4

Measurement board

The different measurement boards for the LDO and TC sensors are illustrated in
Figure 15
connector is only present on TC boards.
Connector J7 (inputs & outputs)
Measurement alarms relays
1. Common
2. Output relay 1
3. Output relay 2
4. Output relay 3
Note: Relays N.O. or N.C. depends on the jumper
position on the relays. Refer to
relays on page
below. The type of board is easily identified by the J8 sensor connector. This
Figure 14 LDO Measurement board
Figure 16 Connector J7
Measurement alarm
32.
Figure 15 TC Measurement board
Figure 17 Connector J8
Analog current (or voltage) outputs
5. Analog GND
6. Output 1
7. Output 2
8. Output 3
Digital inputs
9. Hold input. To deactivate the sensor from
a PLC system, connect a dry contact
between J7.9 and J7.12
10. Not used
11. Not used
12. Digital GND
13. to 16. Not used
Installation
Figure 14 and
31