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IMPORTANT:
Go to www.extron.com for the complete
user guide, installation instructions, and
specifications before connecting the
product to the power source.
CTR 8 • Setup Guide
The Extron CTR 8 provides contact closure input switching for most Extron switchers with
RS-232 capability. It allows simple push-buttons to remotely switch and mute video sources.
NOTE: For full installation and operation details, see the CTR 8 User Guide, available at
www.extron.com.
Installation
ATTENTION: Turn the input and output devices off and unplug their power cords.
Verify that the CTR 8 is disconnected from the power source before proceeding.
12V
POWER IN
POWER OUT
RS-232
Tx
4
CGT+V
3
CGT+V
2
CGT+V
1
CGT+V
8
CGT+V
7
CGT+V
6
CGT+V
5
CGT+V
G
Tx Rx G
1.0A
MAX
1.0A
MAX
CONTACT IN / TALLY OUT COM
REMOTE
CTR 8
Power LED
Lights green when
the unit is receiving
power.
CTR 8
Power LED — Lights green when the unit is receiving power.
4
3
2
1
1
1
Figure 1. CTR 8 Rear Panel
a
DC power input with loop-through — Wire the external 12 VDC power supply
as shown below and connect it to the Power In connector.
SECTION A–A
Ridges
Smooth
Power Supply Output Cord
A
A
3/16”
(5 mm) Max.
The Power Out connector allows power to be looped to an Extron device that
uses +12 VDC voltage. Follow the same pin diagram above to connect a device to
the Power Out connector.
b
Contact closure inputs with tally outputs — Connect contact closure source devices
to these 4-pole female captive screw connectors. Wire each connector as shown below.
CGT+V
Contact (C)
Ground (G)
Tally output (T)
T
ally voltage (+V)
Transmit (Tx)
Receive (Rx)
Ground (G)
Tx Rx
RS-232
G
Transmit (Tx)
Ground (G)
Tx
COM
G
NOTE:
• For “Show Me” cables, the ground pin connection is optional.
• Do not connect “Show Me” cables to the +V pin.
POWER IN
POWER OUT
1.0A
MAX
1.0A
MAX
POWER IN
POWER OUT
1.0A
MAX
1.0
A
MA
X