OPTO 22 B3000-B, Руководство пользователя

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B3000-B Serial Brains User’s Guide
11
11
3: 3: WiringChapter 3
3: Wiring
See the section below for communication cables recommended for use with the B3000-B and
B3000-B-OMUX. See
page 12 for wiring diagrams that show how to connect a B3000-B brain to a SNAP PAC
S-series controller.
COMMUNICATION CABLES
The following cables are recommended for RS-485/422 serial communications. Although you may elect to use
other cables, keep in mind that low capacitance (less than 15 pF/ft.) is important for high-speed digital
communication links. The cables listed below are all 24-gauge, 7x32 stranded, with 100-ohm nominal
impedance and a capacitance of 12.5 pF/ft.
Select from the following two-, three-, and four-pair cables, depending on your application needs. All will
yield satisfactory results. It is recommended that you choose a cable with one more pair than your application
requires. Use one of the extra wires, rather than the shield, for the common.
See belden.com and www.manhattanwire.com .
Two-Pair:
Belden P/N 8102 (with overall shield)
Belden P/N 9729 (individually shielded)
Belden P/N 8162 (individually shielded with overall shield)
Manhattan P/N M3475 (individually shielded with overall shield)
Three-Pair:
Belden P/N 8103 (with overall shield)
Belden P/N 9730 (individually shielded)
Belden P/N 8163 (individually shielded with overall shield)
Manhattan P/N M3476 (individually shielded with overall shield)
Four-Pair:
Belden P/N 8104 (with overall shield)
Belden P/N 9728 (individually shielded)
Belden P/N 8164 (individually shielded with overall shield)
Manhattan P/N M3477 (individually shielded with overall shield)