7800 Multiframe Manual
7825DSK2-LG(-HD)(-3G) 3G/HD/SD Dual Downstream Keyer
Page 2-6
Revision 2.0
INSTALLATION
2.3. POWER REQUIREMENTS
The standard 7825DSK2-LG(-HD)(-3G) is a 2 slot card contained within the 7800FR. The 7800FR
frame comes standard with one auto-ranging power supply that automatically senses the input voltage
over the range of 100 to 240 VAC. An additional power supply (7800PS) can be ordered to provide
fully redundant powering of the frame. Power should be applied by connecting a 3-wire grounding type
power supply cord to the power entry module on the rear panel of each power supply. The power cord
should be minimum 18 AWG wire size; type SVT marked VW-1, maximum 2.5m in length.
The power entry modules contain a standard IEC power inlet connector, two 5 x 20 mm fuse holders
and an EMI line filter.
CAUTION – TO REDUCE THE RISK OF ELECTRICAL SHOCK, GROUNDING
OF THE GROUND PIN OF THE MAINS PLUG MUST BE MAINTAINED.
2.4. CONNECTING THE REMOTE CONTROL PANEL
The 7825DSK2-LG(-HD)(-3G) is available with a rack mountable remote control panel. The remote
control panel is connected to the
SERIAL CONTROL
connector on the Keyer units using COM B of the
breakout cable (Evertz Part # WP-SERIAL-COM-1-0), provided. For longer distances, simply make
your own cable of the required length according to the diagram in Table 2-6. Communications to the
remote panel is through a standard straight-through RS-422 connection, enabling the panel to be
located up to 1000 feet from the main electronics unit.
7825DSK2-LG(-HD)(-3G) End
Remote Panel End
9 pin D
Male
Pin
Belden
9729
9 pin D
Female
Pin
1
1
Tx-
2
-------1a------
Rx-
2
Rx+
3
-------2b------
Tx+
3
Rx Gnd
4
---drain 2----
Rx Gnd
4
5
Tx Gnd
6
---drain 1----
Tx Gnd
6
Tx+
7
-------1b-----
Rx+
7
Rx-
8
-------2a------
Tx-
8
9
9
Frame
Gnd
Shield
---drain 1----
Frame
Gnd
Shield
Table 2-6: Remote Control Panel Extender Cable