**I recently lead our CZO field team to install and configure a network of Campbell Scientific CR1000 data loggers. The layout of the locations runs from the bottom or valley site, up to a mid-slope site, then finishing at the ridge top. To prepare for the configuration we laid out close to 400 meters of twisted pair cable housed in 1⁄2 inch pvc conduit in two sections; section 1 ran from the valley floor to mid-slope and seciton 2 went from mid-slope to ridge top. **
After laying out all the cable three MD-485 Multidrop Interfaces were connected to the data loggers. These interfaces units were connected to 3 of the 4 CR1000 data loggers to the CS I/O ports. The advantage of using these ports are 1. - they can provide power to the interface and 2.- it leaves the RS-232 port open which can used for other communications. A Cell210 connected to the ridge top data logger to the CS I/O port allows continual data transmissions.
The MD-485’s are configured for CS I/O & RS-485 communications using port SDC7. In order for the data loggers to accept this configuration they were also setup for SDC7 with a a default baud rate of 9600. A higher baud rate could not be used due to the length of cable between the sites. Each data logger is configured with a unique PakBus address too.
The mid-slope site config is slightly different. First, to allow data from the valley floor site to pass through the cable from the lower site was connected to the MD-485. The other cable going to the ridge top was also connected and a SC12 cable was used to make the connection between the MD-485 and the CR1000. In addition to the main CR1000, another CR1000 is co-located at the site. The two data loggers are connected via the C1 & C2 ports. To do this this the wires need to be opposite of the other side. For example, green wire connected to C1 and white wire connected to C2 on the primary logger requires the green wire to be connected to C2 and white wire connected to C1 on the secondary logger. The primary logger also requries the router setting to be set to True. The beacon was also set to 60 and interval to 300 and the C1 port set to baud rate 9600 fixed.
At the ridge top site another MD-485 was installed along with a Cell210 modem. The modem and the logger are using PPP mode. In our case we are using the Campbell Scientfic data plan so the moden SHOULD come preset. MAKE SURE YOU CHECK the settings! The modem should be set to SDC8 and using PPP mode (the mdoe could be different depending on how data will be transmitted). The SC12 cable allows two components to be connected via CS I/O which was how both the MD-485 and the Cell210 are connected and powered. Remember the MD-485 comport is set to SDC7 and the cell is SDC8 so no interefence occurs using the same SC12 CS I/O connection. The data logger should have the router set to TRUE, SDC8 for the Cell210 with baud rate of 115.2k, SDC7 for MD-485 and baud rate of 9600. You will also need to enter the DNS and port number. This will depend on the service you are using. For example, if you use CS and the konnect system, you will register the Cell210 with konnect and you will have to assign the PakBus address for that logger. The system will then provide you with a DNS and port number. These will have to be entered into the data logger. And if you decide to add a TCP Password you will have to enter it into the konnect website AND the data logger.
As long as things are powered and settings are entered correctly data should now be transmitting via your Cell210.