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08905071A - 4 -
RS232 QUERIES
NAME QUERY RESPONSE EXAMPLE EXPLANATION
Zone Power ?{z#}PR+ ?{z#}PR{0/1}+ ?7PR0+ Power in zone 7 is OFF.
Input Select ?{z#}SS+ ?{z#}SS{s#}+
?5SS3+
Zone 5 is Source 3.
[6] AC POWER INPUT
Standard IEC 3-Conductor AC Line Cord Receptacle for plug-in of a 3-conducator power line cord. Be
sure to note if the power receptacle is domestic (120VAC type) or international (240VAC type).
[7] RS232 EXPANSION
The HD44C and HD44CC5 can be expanded into a larger system. By using any combination of the
HD44C and HD44CC5 (up to 8 systems), a larger High-Definition distribution system can be created.
For instance, two HD44C systems can be combined to create a much larger 4 source input to 8 zone
output. The two HD44C systems must have its own unique address (see ADDRESS (DIP SWITCH)
section). The included RS232 expansion cable allows a single RS232 control port to be used to
command the entire system. The expansion cable is connected between the DB9 (5) and 3.5mm
stereo mini jack (7).
DB9 MALE 3.5MM PLUG
CIRCUIT PIN
PLUG CIRCUIT
TX 2 TIP TX
RX 3 RING RX
GND 5 SLEEVE GND
[8] ADDRESS (DIP SWITCH)
Switch 1 & 2: Unit Address (for Expansion mode)
ADDR SW 1 SW 2
UNIT 1 ON ON
UNIT 2 ON OFF
UNIT 3 OFF ON
UNIT 4 OFF OFF
Switch 3: ON for firmware write protect
Switch 4: ON for front panel IR receiver / OFF for rear panel IR receiver