Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 181)

Hardware Installation
2−109 VM 3000 Installation and Operating Manual
Installing VM 3000 VGA Status Display
Please refer to Appendix A for installation instructions.
Serial Data Cables
The RS−422 cables used to connect VM/SI 3000 controllers, VTRs, and control panels may be known by various names de-
pending on the devices to which they are connected. Thus a particular serial bus might be called the “Sony bus,” the “MPK
bus,” etc. In spite of the different terminology, each of these buses consist of a 4−conductor (plus ground) cable.
Maximum length per bus is 1220 meters (4003 ft).
The rear panel serial data cable connectors on the VM/SI 3000, CP 3000, MC 3000, and MI 3040 are 9−pin D, female. The
CP, MC, and MI connectors are arranged for loop−through wiring. No termination is required. While these connectors are
ESbus compatible, it should be noted that the Grass Valley serial data cables use only 5 of the 9 pins described in the ESbus
specification (Appendix F).
The following ready−made cables, with installed 9−pin D male connectors, are available from Grass Valley (VDE* cables
include ferrite cores):
1 meter (3.3 ft) 8 meters (26.2 ft)
2 meters (6.6 ft) 16 meters (52.5 ft)
4 meters (13.1 ft) 32 meters (105 ft)
For ordering information, see page 1−24.
For those who wish to prepare their own cables, the pin−outs are shown in Figure 2−124. The cable itself should be Belden
8723 or equivalent. Details concerning ferrite cores are given in Figure 2−125.
1
2
3
7
8
1
2
8
P1
DB9P
(male)
Shield (drain)
Green
Black
White
P2
DB9P
(male)
Figure 2−124. Serial data cable wiring. Reference: “Assembly, BCS−3000 Serial Data Cable,” Grass Valley drawing no.
01−041600−TAB.
3
7
Red
Frame ground
VM/SI 3000 controller
board
(bus controller)
Control panel or VTR
(tributary)
Receive A (−)
Transmit A (−)
Receive B (+)
Transmit B (+)
Transmit B (+)
Transmit A (−)
Receive B (+)
Receive A (−)
Frame ground
Individually shielded, twisted pairs
Ferrite core
Ferrite core
Green
Black
White
Red
*see Glossary.