Measurement Board; Measurement Alarm Relays - Hach ORBISPHERE K-M1100 User Manual

Installation

3.7.3 Measurement board

Connector J7 (inputs & outputs)
Measurement alarms relays
1. Common
2. Output relay 1
3. Output relay 2
4. Output relay 3

3.8 Measurement alarm relays

Figure 18 Output relays
32
Figure 16 Measurement board
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
Note: It is recommended to use this functionality in
order to extend the sensor lifetime for installations
with a CIP process that can damage the spot.
10. Not used
11. Not used
12. Digital GND
13. to 16. Not used
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. On the picture example on the left:
• Upper relay is set to NC
• Middle relay is set to NO
• Lower relay is shown with no jumper
Note: J14 (upper relay) is relay 1
J18 (middle relay) is relay 2
J19 (lower relay) is relay 3
Figure 17 Connector J7