3Room/relay ports (Relay 1, Relay 2) — These allow control of “room” functions – items such as room lighting, window coverings, and display screens – via momentary or latching contact. These contacts may be used to control any equipment as long as the contact specifications of a total of
24 volts at 1 ampere are not exceeded for each port.
Each relay has two sets of contacts: one pair is closed by default, the other pair is open by default, as shown below. Both of a relay’s contacts can be used at the same time, so a total of four sets of contacts can be used simultaneously.
Normally open (1) |
| Normally open (2) |
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Normally closed (1) |
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| Normally closed (2) |
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A B C D E A B C D E
Not |
used |
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System 7SC Relay ports
ENormally closed (2) D Normally closed (1) C Normally open (2)
B Normally open (1) A Not used
To / from
room control
equipment
When the room function is active, the closed contacts open, and the open contacts close. Contacts can be programmed to operate in one of two ways:
•latching (brief contact) (press to turn on, press to turn off), or
•momentary (timed) (press to turn on, timeout to turn off).
In the timed mode the default timeout period is 1/8 second. Use the front panel menus or the control software for Windows to change the length of the timeout period. See “Serial Communication”, chapter four, for details.
4Display power sensor port — This mini
The power sensor port supplies +12 VDC. To avoid electric shock when connecting the cable from the power sensor into the System 7’s rear panel port, always connect the stereo jack at one end of the cable to the power sensor unit before plugging the jack at the other end into the System 7.
The wiring connections are the same on both | Tip (+12 V) | |||||
ends of the cable that connects the power sensor |
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to the System 7. Wire the included connector as |
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shown at right. |
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Use a |
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Sleeve (
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5IR communications port (IR Comm) —
Connect the included IR Emitter or optional IR Broadcaster via this captive screw connector to send learned/uploaded IR signals (which differ from IR 701 remote control signals) to control the projector. The signals from the optional IR Broadcaster cover a wider area and greater distance than do those from the emitter, so it can be placed further from the projector.
System 7SC • Installation |