Hach-Lange SIGMA SD900 Refrigerated Sampler and All Weather Refrigerated Sampler User Manual - Manual (Page 44)

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Installation
3.5.3 Communications installation
The sampler can be connected to a PC or Mod bus device for data
transfer or programming.
Prerequisites:
• Serial cable ( Figure 23 ). See Accessories on page 94 for
ordering information.
Installation procedure:
1. Connect one end of the cable to the PC or Mod bus device.
2. Connect the other end of the cable to the controller. The pin
assignments for the serial cable are detailed in Table 1 .
.
Figure 22 Splitter
Figure 23 Serial connector cable
Table 1 Serial cable reference
7-pin connector assignment letter Signal description DB-9 pin assignment number
B Signal ground 5
D RCD 3
F TXD 2
G Earth ground —