Installation Guide
3
AT-OME-SR21
Audio
Connect to an audio DSP, amplifier, or other
audio distribution devices.
RS-232
A 3-pin captive screw connector has been
included for RS-232.
Pin out will be determined by the RS-232 cable
and connect as RX (receive), TX (transmit) and
(Ground). Ground will be shared between port 1
and port 2.
GND
RX
TX
GND
RX
TX
RX
TX
1
2
Use a jumper between the negative and
ground pins when using an unbalanced
connection.
Balanced
Unbalanced
ANALOG IN
L
R
Negative
-
Negative
-
+
Positive
+
Positive
Gr
ound
ANALOG IN
L
R
+
Positive
+
Positive
Gr
ound
Relay
A dual low-voltage signal relay is built into
the OME-SR21 for control of devices such
as electric screens and display lifts. A 3-pin
captive screw connector has been included
for connection.
When using a dual signal relay with an electric
projection screen, it allows for two different
circuits to be controlled: up and down
(pictured to the right)
.
The relay will default to follow the display. When
the unit turns on the relay will close C1 and
open C2. When the display is turned off and
signal is no longer being received C1 will open
and C2 will close.
There are 3 connections for the relay: C1, COM,
and C2 (Circuit 1, Common, and Circuit 2.)
C2
C1
COM
C1
C1
C2
C2
COM
COM
Down
Closed
Open
Open
Closed
Up
NOTE:
Port 1 is for unit control and port
2 will control the display.
