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6 Documentation Number 232D4SS84502 Manual
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Figure 3. Master Port DCE/DTE Jumpers
Figure 4. PC Board Options for RS-485
If an IBM PC (DTE device) is connected to the 232D4SS8
Master port, the Master port should be configured as a DCE port. If
a modem (DCE device) is connected to the Master port, it should be
configured as a DTE port. Refer to cable charts in Appendix B.
The Master port is configured as either a DCE port or a DTE
port by moving jumpers JP1: 1 through JP1: 7. JP1 is located inside
the Smart Switch. Refer to Figures 2 & 3. To configure the Master
port as a DCE port, jumpers JP1: 1 through JP1: 7 must be moved
to the DCE position. Refer to Table 2. To configure the Master port
as a DTE port, jumpers JP1: 1 through JP1: 7 must be moved to the
DTE position. Refer to Table 3.