User`s manual

Alcorn McBride Digital Video Machine DVM-7400 User’s Manual Rev 1.5
66
Voltage inputs, such as from a PLC, could be wired this way:
24 Volt Output 8
Ground Reference
24 Volt Output 4
24 Volt Output 2
24 Volt Output 1
PLC
VoltageContacts
I/O CONNECTOR
CONNECTOR DB37
19
37
18
36
17
35
16
34
15
33
14
32
13
31
12
30
11
29
10
28
9
27
8
26
7
25
6
24
5
23
4
22
3
21
2
20
1
Switch set
to voltage
Diodes are not needed, since the PLC can actuate any combination of lines desired.
Parallel Outputs
Two status outputs are provided. They are dry contact closures rated at 24 VDC and
0.9 amp max. Their function is described below.
Function Pins Description
Playing 9,28 Closed when the unit is playing.
Fault 10,29 Closed when the unit detects a fault
condition.
You can also control these outputs with serial “Relay” commands. One practical
application of this is to embed the “Relay” commands in a playlist along with “Play”
commands. This way you can close or open a relay when a video plays or stops.
Please refer to the Command Protocol section for details on how the “Relay”
command works, and to the Playlist section for an example playlist demonstrating the
use of the “Relay” command.