The audio cable is a conventional twisted pair shielded cable; 24 gauge or larger recommended. The audio connectors are 3-pin Phoenix
connectors. The audio amplifier has a high (10 K Ohm) input impedance to allow bridging a number of amplifiers across the line and requires
a 1 volt audio signal to drive the amplifier to full output.
The digital control cable (RS422) requires a minimum of 5 conductors: RX+, RX-, TX+, TX- and Ground. Each data pair must be on its own
twisted pair: one pair for RX+/- and one pair for TX+/-.
When wiring from the RS422 adapter to a column or combining multiple arrays together on the same network, all data connections are wired
in PARALLEL: RX+ to RX+, TX+ to TX+ and so on.
Recommended RS422 data wire type: CAT5E wire is acceptable, or for shielded type, Belden 9729 has been tested by Renkus-Heinz up to
800 meters. When using long wire lengths, a 120 Ohm terminating resistor may be necessary.
The data connectors for the digital control line are a standard 9-pin DB-9 connector and a 5-pin Phoenix connector. These are also in paral-
lel and either can be used. Since RS422 has no pinout standard for a DB-9 connector, pay special note to the pinouts described below. The
wiring of the 5-pin Phoenix connector and the DB-9 connector is shown below.
The array’s access port includes input connectors and looping output connectors for the audio and RS422 digital control lines. Refer to next
page for details.
(Phoenix Connector)
DB-9 (View into female end)
DB-9 (View into male end)
IC Live Users Manual, ICL-F & ICL-F-DUAL
33
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