Connections To Electronic Boards; Sensor Cable; Electronic Boards Connectors; Main Board - Hach ORBISPHERE 51x Manual De Usuario

4.8 Connections to electronic boards

Potential Instrument Damage. Delicate internal electronic components can be damaged by static electricity,
resulting in degraded performance or eventual failure.
Note: Any loose connection wires should be bundled tightly together with the use of nylon cable ties.

4.8.1 Sensor cable

An ORBISPHERE cable is needed to connect the sensor(s) to the instrument. The portable
instruments have a Lemo 10 connector where a sensor cable has to be connected. The other
versions have a cable gland for cable passage, and the cable must be permanently connected to the
corresponding measuring board connector. Therefore the portable instruments require a standard
sensor cable, while the other versions require a sensor cable with free wires on the instrument end.
The free wires are connected to the connector J8 on the measuring board, as detailed later in this
chapter.

4.8.2 Electronic boards connectors

Connectors P8 on the main board
(Figure 6 on page 12 and
black levers on either side of the connector and pull it out securely. Perform all connections with
these connectors unplugged. Once finished, attach the connectors to the boards by pushing them
firmly in place (levers up).

4.8.3 Main board

Figure 4 Main board
Connector P8
The numbers listed below refer to the 13 available P8 connections (from left to right) in
1. RS-485 (signal A)
2. RS-485 (signal B)
3. PROFIBUS-DP (GND)
4. PROFIBUS-DP (+ 5 V)
5. PROFIBUS-DP (signal -)
6. PROFIBUS-DP (signal +)
7. PROFIBUS-DP (signal RTS)
Connector P3
N O T I C E
(Figure 4 on page 11) and J7 and J8 on the measurement board
Figure 7 on page 12) are made of two parts. Push down carefully the
Figure 5 Connector P8
8. Not used
9. Not used
10. Not used
11. System alarm relay (N.O.)
12. System alarm relay (N.C.)
13. System alarm relay (Common)
Figure 5.
English 11