Sierra Video Yosemite - Manual (Page 63)

OPERATION
57
Port 3 (RS-485 Control Panels)
Yosemite Family video routing switcher frames have four male 3-pin connectors labeled “RS-485 Control
Panels” on the rear. Yosemite Family audio frames have just two male 3-pin connectors on the rear. Each
Yosemite control panel has two parallel connectors.
The maximum system cable length is 2,000 feet (310m) when the RS-485 network operates at the higher
speed of 31.25K baud. The maximum system cable length is 5,000 feet (1,524m) when operated at 9600
baud. Consult your Control Panel Manual for more detailed information.
If you make your own interconnect cables, Pin 2 is Ground. Pin 1 and 3 connect pin for pin.
Figure 1: RS-485 Interconnect Cable
Power Up
Once all signal and control connections have been made, turn on the power switch. In addition to the
LEDs on the power supply, the plug-in crosspoint modules also have LEDs on the front of the module.
On the audio frames, the green LED over the power switch confirms that the low (<24 volts) voltage is
present on the motherboard. If you have power up problems ensure that the AC fuse on the back of the
switcher is seated properly.
On power up, the controller will restore the routing switcher to the last state it was in before the power
was turned off including all configuration settings as well as crosspoint switcher status.
Four RS-485 Control
Panel Connectors
Located on the Rear
of the Frame