Extron Electronics CTR 8 User Guide - Manual (Page 8)

CTR 8 • Panels and Cabling 3
a
DC power input with loop through — Wire the external 12 VDC power
supply as shown in figure 3 and connect it to the two-pole captive screw
Power In connector.
SECTION A–A
Ridges Smooth
Power Supply Output Cord
A
A
3/16”
(5 mm) Max.
Figure 3. Power Connection
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.
ATTENTION:
• Do not tin the wires. For best results and to reduce the risk of short circuits,
trim just 3/16 inch (5 mm) of the jacket from the wires. If it is any longer, the
exposed wires may touch, causing a short circuit between them. If it is any
shorter, the wires can be easily pulled out even if tightly fastened by the captive
screws.
• Always use a power supply supplied by or specified by Extron. Use of an
unauthorized power supply voids all regulatory compliance certification and
may cause damage to the supply and the end product.
• Unless otherwise stated, the AC/DC adapters are not suitable for use in air
handling spaces or in wall cavities. The power supply is to be located within the
same vicinity as the Extron AV processing equipment in an ordinary location,
Pollution Degree 2, secured to the equipment rack within the dedicated closet,
podium or desk.
• The installation must always be in accordance with the applicable provisions of
National Electrical Code ANSI/NFPA 70, article 75 and the Canadian Electrical
Code part 1, section 16. The power supply shall not be permanently fixed to
building structure or similar structure.
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 in figure 4.
NOTES:
• For “Show Me” cables, the ground pin connection is optional.
• Do not connect “Show Me” cables to the +V pin.
CG
T+
V
Contact (C)
Ground (G)
Tally output (T)
Tally voltage (+V)
Transmit (Tx)
Receive (Rx)
Ground (G)
Tx
Rx RS-232
G
Transmit (Tx)
Ground (G)
Tx
COM
G
Figure 4. Contact Input Wiring
• C = Contact input pin: Momentary closure of this pin to ground selects the
corresponding number input. Selection is triggered specifically at the moment of
closing, not opening.
• G = Ground pin
• T = Tally output pin: controls the LEDs on push buttons. When an input is
selected, only the tally corresponding to that input is active.
• +V = Tally voltage output pin (optional): provides the +5 VDC supply voltage
needed to illuminate tally LEDs.
POWER IN
POWER OUT
1.0A
MAX
1.0A
MAX
POWER IN
POWER OUT
1.0A
MAX
1.0A
MAX