Operating Mode Selection And Wiring - Black Box 202T User Manual

4.4 Operating Mode Selection and Wiring

Table 4-2. Operating mode selection and wiring.
Wire Mode
2 wire Half-
Duplex
Master or
remote(s)
2 wire Simplex
(Bits)
Master
2 wire Simplex
(Bits)
Remote
4 wire Half-
Duplex
Master
4 wire Half-
Duplex
Remote
4 wire Full
Duplex
SW3 2-wire with SW2-5 off and SW2-6 on will enter self-test display.
SW3 4-wire with SW2-5 off and SW2-6 off is an invalid combination.
Use Connectors
2 wire to 2 wire
parallel all units.
2 wire is out.
2 wire is in.
Cross wire 4 wire
to all remote 2 wire
and 2 wire from all
remote 4 wire.
Same as 4-wire
Master. Cross wire.
Cross connect 2 wire 4 wire
to 4 wire between
both units.
NOTE
CHAPTER 4: Making Connections
SW3 SW2-5 SW2-6 Notes
2 wire OFF
2 wire ON
2 wire ON
4 wire ON
4 wire ON
OFF
OFF One master with 1 or
more remotes.
Carriers flash.
ON Data flows from
master to remote(s)
only. No carrier.
OFF Data flows from
master to remote(s)
only. Carrier on.
ON One master with 1
or more remotes.
OFF Remote carrier LED
always on.
ON 2 Modem 202Ts only.
Both carrier LEDs on.
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