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ACM-3401 Series Hardware User’s Manual
10
Terminal Pin Define is described as below:
* Available only for device versions with enhancements
5) Audio Input / Output
The IP device supports Audio input / output with terminal block connections. Pushing down the
tab above will reveal a small slot for you to insert the end of wire. Release the tab and the wire will
be fastened by the internal spring. The connection pins are as shown in this image:
Pin Name
Description
Spec
DIO PW
Electrically connected in parallel with the con-
nector for the power supply, this pin provides an
auxiliary connector for mains power to the unit.
This pin can also be used to power auxiliary
equipment, with a maximum current of 100mA.
Voltage: 12V DC,
Max: 1.2W
DIO GND
Ground
Description
DO
(Transistor
Output)
Uses an open-collector NPN transistor with the
emitter connected to the GND pin. If used with an
external relay, a diode must be connected in
parallel with the load, for protection against
transient voltages.
Max load = <100mA
Max voltage = 24V
DC (to the
transistor)
DI
(Digital
Input)
Connect to GND to activate, or leave floating (or
unconnected) to deactivate.
Must not be
exposed to
voltages greater
than 30V DC.
VoIPon www.voipon.co.uk [email protected] Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
