Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 341
PakBus LAN Example
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Section 8. Operation 8.5.6 PakBus LAN Example To demonstrate PakBus® networking, a small LAN (Local Area Network) of CR800s can be configured as shown in figure Configuration and Wiring of PakBus LAN (p. 341). A PC running LoggerNet uses the RS-232 port of the first CR800 to communicate with all CR800s. All LoggerNet functions, such as send programs, monitor measurements and collect data, are available to each CR800. CR800s can also be programmed to exchange data with each other (the data exchange feature is not demonstrated in this example). 8.5.6.1 LAN Wiring Use three-conductor cable to connect CR800s as shown in figure Configuration and Wiring of CR800 LAN (p. 341). Cable length between any two CR800s must be less than 25 feet (7.6 m). COM1 Tx (transmit) and Rx (receive) are CR800 digital I/O ports C1 and C2 respectively; COM2 Tx and Rx are digital I/O ports C3 and C4, respectively. Tx from a CR800 COM port is connected to Rx of the COM port of an adjacent CR800. Figure 106: Configuration and wiring of PakBus LAN 341
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