Symetrix SymNet Audio Matrix Control I/O Quick Start Manual page 3

Quick Start Guide
Control I/O
Analog Control Input and Open Collector Output Wiring
Analog Control Input Wiring
The following illustrations show the connection of either a 10k ohm linear potentiometer, a mechanical rotary encoder or
switches to one of the 8 analog control inputs of Control I/O. (Please see the SymNet Designer online help for information on
how to assign an analog control input to a SymNet DSP parameter.)
Euroblock
+5V (OUT)
INPUT
GND
Typical Mechanical Rotary Encoder Wiring
Euroblock
A
B
GND
The Symetrix model RC-3 is the perfect potentiometer match for the Control I/O. Suitable potentiometers, switches and
encoders might also be sourced from electronic parts suppliers such as Digi-key. Note that encoders must be of the mechanical
type.
Disclaimer: From time to time we test the compatibility of our own products with those of third parties. While we are happy to
share with our customers the results of our own studies as well as other possibly unsubstantiated information regarding these
third party products, it is the policy of Symetrix, Inc. to neither endorse, recommend nor support products manufactured and/or
supplied by third parties. The responsibility of choosing third party products which are compatible with Symetrix products rests
solely with the qualified contractor, consultant or system designer.
Open Collector Output Wiring
The following illustrations depict three typical open collector output hook ups. The most common uses for the open collector
outputs are to fire external LED indicators (LED lit when OC inactive) or drive external relays. (Please see the SymNet Designer
online help for information on how to address an Open Collector output in a SymNet DSP design.)
Note: You do not need
+5 VDC
to supply the
components on the
"Internal" side.These
components are internal
1N914
to the Control I/O and
only illustrated here for
the purpose of under-
221 ohm
standing the operation
of the circuit.
PZTA06
1N4003
0V
2C Shielded Twisted Pair
A or +ve
B or -ve
GND
Internal External
Ferrite Bead
Open Collector
to OC output
10 ohm Output
GND
1. Self-Sourcing
LED Drive
To download the latest version of SymNet Designer, the Windows application that
controls all SymNet hardware, go to: www.symetrixaudio.com
Typical Control Switch Wiring for Discrete Switch Inputs
10kohm
Linear
Taper
Pot
Encoder
1N4004
LED
to OC output
2. External Relay Drive
SymNet
Audio Matrix
Euroblock
A
B
GND
External Relay Supply
(24 VDC Max)
Relay
50 mA Max
coil current
to OC output
3. External LED drive using
external supply for
more current
TM
3/11
Switch 1
Switch 2
+V from
external supply
LED