Digital Inputs and Relays
The Digital Inputs and Relays ports provides optically-isolated digital inputs and relay outputs
that can be controlled by the show control software. See the “
Programming Guide
“
section for the MSVPP commands that activate or are issued by the these ports.
NOTES:
•
By factory default, automatic reporting of Digital Inputs 1 through 4 is
disabled. To enable reporting, use the
Set
input
trigger
on
MSVPP
command (see the “
Programming Guide
” section).
•
Use a single cable for all inputs and relay ports and snap one of the included
ferrite beads on the cable, as close to the unit as possible.
i
Digital Inputs 1 through 4 —
These inputs allow the media player to sense
1
2
+ -
+ -
a discrete signal, such as change in a switch position. Connect the desired
discrete input line to the unit via two poles (
+ and –
) of a 3.5 mm 4-pole
captive screw connector (see “
Optically-isolated Digital Inputs
”, on
page 94, for an illustration of a typical input connection).
The media player issues an MSVPP message on Remote port 1 when it detects a
change of state on the digital inputs, prompting the connected device to respond as
appropriate.
j
Power —
This port pr12 VDC power at up to 1.8 A, typically for use
12V
POWER
with Digital Inputs 1 through 4 (item
i
) above. The power is internally
protected. Connect the device requiring power to two poles (
12V and
ground [ ]) of a 3.5 mm 4-pole captive screw connector.
WARNING
:
12 VDC is always present on this port when the media player is powered
on. Ensure that no conductive material comes into contact with these
terminals.
A typical use of this voltage is shown in “
Optically-isolated Digital Inputs
,” on
page 94.
k
Relay Outputs —
These ports are four sets of NO and NC relay contacts.
NC C NO
NC
R1
Connect an external device that you want to be able to switch on or off to the
player via three poles (normally closed [NC], common [C], and normally open
[NO]) of the 3.5 mm 4-pole captive screw connectors.
NOTE:
Relays R1 and R4 each are on a single captive screw connector.
Relays R2 and R3 each span two captive screw connectors.
The player toggles the relay on or off in response to an MSVPP signal from the device
connected on Remote port 1 or either LAN port, see “
Relay Contacts
“ on page 95.
JMP 9600 Media Player • Installation
11
