Hach-Lange SD900 Refrigerated Sampler, SD900 AWRS Basic User Manual - Manual (Page 13)

Electrical installation
Controller connections
W A R N I N G
Electrical shock hazard. Externally connected equipment must have an applicable country safety
standard assessment.
Figure 8 shows the connections that can be made to the controller.
Figure 8 Controller connectors
1 Power supply 4 Distributor/full bottle shut-off
2 Serial communications 5 Auxiliary device
3 SDI-12 device option 6 Thermal unit (AWRS only)
Connect a flow meter
Connect a flow meter to the controller to start or stop the sampler when the sample flow goes above
or below a specified value.
Items to collect:
• Multi-purpose full cable for Sigma flow meters (or 980 half cable for the model 980 flow meter).
• Optional splitter for additional connections. Two or more splitters can be connected in series.
1. Connect one end of the cable to the flow meter. For the model 980 flow meter, refer to the model
980 flow meter user manual.
2. Connect the other end of the cable to the auxiliary device connector on the controller.
Note: If the flow meter has a 6-pin cable, use the 6-pin to 7-pin adapter cable.
Connect a PC or communications network
Connect a PC or a communications network to the controller to transfer data or to configure the
sampler.
Items to collect:
• Serial cable, 7-pin RS232 to DB-9 (refer to Figure 9 ). Connections: B to 5 (signal ground); D to
3 (RCD); F to 2 (TXD); G (ground).
1. Connect one end of the serial cable to the communications device or network.
2. Connect the other end of the cable to the serial communications connector on the controller.
English 13