Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 159)

Hardware Installation
2−87 VM 3000 Installation and Operating Manual
1
6
R−
2
7
3
T−
8
4
9
5
to VM/SI 3000
serial port
G Ground
R− Receive minus
R+ Receive plus
T+ Transmit plus
T− Transmit minus
DB9P
(male)
DB9S
(female)
= twisted pair
1
6
2
7
3
8
4
9
5
T+ Tx
R+
Rx
G
Tx Transmit
Rx Receive
LG Logic ground
LG
to AT−type computer
serial port
R−
T+
R+
T−
G
Tx
Rx
G
†
A Black Box
®
model GJ−IC455B In-
terface/converter is available from
Grass Valley; part no.
05−040935−001.
RS−422/232
converter
†
ESswitch protocol
available on odd−
numbered ports only
Figure 2−102. Cable for connecting VM/SI 3000 to AT−type computer..
1
6
R−
2
7
3
T−
8
4
9
5
R−
T+
to VM 3000
serial port
G Ground
R− Receive minus
R+ Receive plus
T+ Transmit plus
T− Transmit minus
DB9P
(male)
= twisted pair
T+ R+
R+
T−
G G
Tx
Rx
DB25P
(male)
1
2
3
4
5
LG
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Tx
Rx
G
to PC−type computer
serial port
Rx Receive
Tx Transmit
LG Logic ground
ESswitch protocol
available on odd−
numbered ports only
†
A Black Box
®
model GJ−IC455B In-
terface/converter is available from
Grass Valley; part no.
05−040935−001.
RS−422/232
converter
†
Figure 2−103. Wiring for connecting VM/SI 3000 to 25−pin PC−type serial port..