Page 27
Reference Manual
IQ–P.I.P.-MEM
Programmable Input Processor for IQ Systems
4.8 Using the AUX Connector
The IQ System offers tremendous
flexibility and the auxiliary feature
connector provides a means of
tapping into it. It can be used to
turn something on/off, send a signal
to another component and receive
a signal from another component.
(See Figure 4.16 for internal circuit
diagram.)
The AUX connector is a 3-pin male
mini XLR connector. Pins 1 and 3
are used to send a signal and pins
1 and 2 are used to receive a
signal.
4.8.1 AUX Output
When the auxiliary feature is turned
on by the IQ System so15
VDC is supplied across pins 1
(ground) and 3 (+). A total of 10
milliamps of current is available. A
1.5 K ohm resistor protects against
shorts.
There are many possible uses for
the AUX output. For example, it can
be used to turn on auxiliary cooling
fans. To do this the AUX connector
would be used to close a relay. The
relay would then turn the fans on or
off. This is shown in Figure 4.17.
AUX
CONNECTOR
GND
+15 V
Not Used
1
3
2
AUXILIARY
EQUIPMENT
110 VAC
SOLID
STATE
RELAY
(C 7308-7)
+
–
Fig. 4.16 The Internal AUX Circuit
Fig. 4.17 A Sample AUX Output Circuit
