Extron Electronics MSW 4V SDI rs - Manual (Page 11)

MSW 4V SDI rs • Installation and Operation
Installation and Operation, cont’d
2-6 MSW 4V SDI rs • Installation and Operation 2-7
See chapter 3, “Serial Communication” for Simple Instruction
Set (SIS) commands to communicate with the MSW 4V SDI rs
via RS-232.
d
Contact connector — Connect a remote contact
closure device to the MSW for remote control
of the switcher, or daisy chain it to other MSWs
for remote control of all the units, via this 5-pin
captive screw connector.
N The switcher must be in normal (manual) mode for contact
closure to work. See "Mode selection", later in this
chapter.
To select an input using a contact closure device, such as an
Extron CCR 204 contact closure remote control (part #60-794-02)
or a locally constructed device, momentarily short the pin for
the desired input number to logic ground (pin 5). To force one
of the inputs to be always selected, leave the short in place. The
short overrides any front panel input selections.
You can also daisy chain multiple MSWs via the Contact
connector for front panel control of all switchers; touch the input
button on one MSW to switch all MSWs. Wire pin 1 to pin 1,
pin 2 to pin 2, and so on.
e
Power connector — Plug the external 12 VDC power supply
into this 2-pin, 3.5 mm captive screw connector. The power
supply is included with the unit.
In the event that power is disconnected from the MSW, the unit
retains mode and input settings.
N The power connector on the rear panel is orange; however,
the plug for the power cord may be either orange or
blue. Either color plug can be connected to the rear panel
receptacle.
To wire the connector, do the following:
1.
Cut the DC output cord to the length needed.
2. Strip the jacket to expose 0.2” (5 mm) of the conductors for
the blue captive screw plug, or 0.3” (7 mm) for the orange
plug.
Power Supply
Output Cord
Orange Captive Screw
Connector
0.3” (7 mm) MAX
SECTION A–A
Ridges
Smooth
A A
Tie Wrap
Figure 2-6 — Power wiring
W Exposing more than the amount of wire described
above could allow the stripped wires to touch each
other, causing a short circuit. This could result in
the external DC power supply overheating and/or
burning.
N Stripping the wires to expose less than the recommended
amount causes them to slide out of the connector too easily,
even if they are tightly pinched by the captive screws.
3. Slide the leads into the supplied captive screw plug and
lock them, using an Extron Tweeker (small screwdriver).
4. Use the supplied tie-wrap to strap the power cord to the
extended tail of the connector.
5. To verify the power cord’s polarity before connecting
it, plug in the power supply with no load and check the
output with a voltmeter.
C Do not tin the stripped power supply leads before
installing the captive screw connector. Tinned
wires are not as secure in the captive screw
connectors and can be easily pulled out. They may
also break after being bent several times.
W The two power cord wires must be kept separate
while the power supply is plugged in. Remove
power before wiring.
Alternately, an Extron PS 123 12 VDC, 3 amp power supply,
(part #60-814-01), can power up to eight MSWs or other Extron
12 VDC devices using only one AC power connector.
CONTACT
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