Hach NA5600 sc Na+ Mode D'emploi page 23

Figure 8 Isolated TTL type digital input
1 Digital input connectors
2 Jumpers (12x)
Digital input Function
1 Channel 1—disable or enable
2 Channel 2—disable or enable
3 Channel 3—disable or enable
4 Channel 4—disable or enable
5 Start calibration
6 Start analyzer
High = relay/open-collector on or TTL input high (2 to 5 VDC), 30 VDC maximum
Low = relay/open-collector off or TTL input low (0 to 0.8 VDC)
3.5.8 Connect to an external device
Note: To keep the enclosure rating, make sure that all of the external and internal electrical access ports that are
not used are sealed. For example, put a plug in a strain relief fitting that is not used.
1. Remove the electrical access cover. Refer to
2. For analyzers with an enclosure, install a strain-relief fitting in one of the external ports for
external device connections. Refer to
3. For all analyzers, put the external device cable through the rubber plug of one of the internal ports
for external device connections. Refer to
4. Connect the cable wires to the applicable terminals on the main circuit board. Refer to
Refer to Specifications
Table 9 Digital input functions
Figure
Figure
on page 3 for wiring requirements.
3 Isolated TTL type digital input
4 Relay/Open-collector type input
Notes
High: disable, Low: enable
High: disable, Low: enable
High: disable, Low: enable
High: disable, Low: enable
High: start auto calibration
High: start analyzer
Low: stop analyzer (standby mode)
Remove the electrical access cover
9.
10.
on page 15.
Figure 11.
English 23