Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 97)

Hardware Installation
2−25 VM 3000 Installation and Operating Manual
HORIZON CONNECTIONS
The VM 3000 can be connected to a Horizon switcher through the General Purpose Interface with Terminal/Computer Inter-
face software (GPI−T/CI) (see Figure 2−28). The protocol for the GPI−T/CI RS−422 port must be set at: 38400 baud, 8 data
bits, even parity, and 1 stop bit (refer to the Horizon GPI−T/CI Manual for configuration instructions).
Figure 2−28. Connection to Horizon distribution switcher.
See Figure 2−29 for a description of this cable
Horizon protocol
RS−422 port
General Purpose
Interface
(GPI)
to Horizon switcher
VM 3000
LAN
See pg
2−46
House time
code
(optional).
See pg.
2−110
Odd serial port
Figure 2−29. Cable for connecting VM 3000 to Horizon switcher.
1
6
R−
2
7
3
T−
8
4
9
5
R+
T−
to VM 3000
serial port
to Horizon GPI−T/CI
RS−422 Port
G Ground
R− Receive minus
R+ Receive plus
T+ Transmit plus
T− Transmit minus
DB9P
(male)
DB9P
(male)
= twisted pair
1
6
2
7
3
8
4
9
5
T+ R−
R+
T+
G G