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Document #:
M00-20-7074 Rev. 005
Page 16 of 32
3.9
Communication
After determining the range of the modems, you can permanently install and wire the remote station modem.
Polarity is critical with all RS-485 communications. Petro-Net Terminal 1 goes to pin 8 on the modem, and
Terminal 2 goes to pin 2 on the 9-pin modem connector. Both modems are wired the same. Use the supplied
Petro-Net connector; connect the black wire to #1 on the Petro-Net Terminal and the white to the #2 Terminal.
RS-485 (Petro-Net) polarity is critical!
3.9.1
Pre-wired Petro-Net Connector
Petro-Net
To Modem Pin #
1 (BLACK)
8
2 (WHITE)
2
3.10 FIT Wiring
The FIT must be powered by a dedicated circuit. The FIT cannot be powered by the pump circuit or reset, as
communication problems will occur. The system warranty is void if this is not followed.
3.10.1 FIT Installation Location Wiring
1. Place the modem inside the FIT.
2. Connect the modem power pack to line voltage using the pigtail supplied.
3. Petro-Net: Use the supplied Petro-Net Connector and connect the black wire to #1 Terminal and white
to the #2 Terminal.
4. Drill a .375-inch hole for the antenna cable in the bottom of the FIT cabinet.
When drilling through the pedestal, make sure to clean up all metal chips.
5. Route the 1-foot cable from the modem to the antenna location. (Seal this hole with silicone sealant).
Be sure to maintain line-of-sight to the FSC.
6. Drill a .250-inch hole in the pedestal and attach the cable to the pedestal of the FIT and secure with
the supplied nut.
7. Attach the antenna cable.
For remote antenna mounting, attach the directional antenna to a pole or other surface using the supplied
mounting brackets. Antenna cables are available in 20-foot lengths. When mounting the antenna remotely be
sure to protect the antenna cable with conduit.
Always keep in mind where the fuel island (remote) modem is! You must maintain a line-of-
sight with the remote modem for best results.
