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08905150B - 8 -
[5] RS232 EXPANSION
The HD88C and HD88CC5 can be expanded into larger systems. By using any combination of the
HD88C and HD88CC5 (up to 4 units), a larger High-Definition distribution system can be created for
up to 32 Zones of Component Video and Digital Audio Distribution.
The expanded HD88C units must have their own unique address (see ADDRESS (DIP SWITCH)
section). The included RS232 expansion cable allows the units to be daisy chained via the RS232
control ports. This is done by connecting the SERIAL LINK port of the master to the XANTECH COM
PORT of the other unit. The XANTECH COM PORT of the master is utilized to provide control of the
entire system. Note that the Master is the main controlling unit. This unit is in charge of coordinating
the communications between all expanded units. It is identified as the master by the unit address
assigned to it. Refer to the ADDRESS (DIP SWITCH) section for further details.
DB9 MALE 3.5MM PLUG
CIRCUIT PIN
PLUG CIRCUIT
TX 2 TIP TX
RX 3 RING RX
GND 5 SLEEVE GND
[6] ADDRESS (DIP SWITCH)
Switch 1 & 2: Unit Address (for Expansion mode)
ADDR SW 1 SW 2
UNIT 1 (Master) OFF OFF
UNIT 2 OFF ON
UNIT 3 ON OFF
UNIT 4 ON ON
Switch 3: Group Code Write Protect
Wr Protect SW 3
Protected OFF
Unprotected ON
Switch 4: IR Receiver Select
IR Select SW 4
Front IR Sensor
Enable
OFF
Rear IR Sensor Enable ON