3
Rear Panel Connections
RELAY 1
1
1
9
9
2
3 4
CO
M
NO
CO
M
NO
CO
M
NC
CO
M
NC
GN
D
AUDIO
ALARM
R-
GN
D
R+
L-
GN
D
L+
CO
M
NC
NO
Figure 3: CSR820 Rear Panel
Item
Connection
Cable
Connector
POWER
Main AC power input (110-240 VAC).
(supplied)
IEC-320 C-14
L-BAND
RF input from the LNB.
75
Ω
coax
F-type (75
Ω)
AUX DATA
OUT
Connect to the serial port of an auxiliary data device.
Twisted pair
22-24 AWG
DB-9 for
RS-232
interface
VIDEO OUT
Connect to a monitor or video distribution equipment
75
Ω
coax
BNC (75
Ω)
AUDIO
Connect to speakers or audio distribution equipment
Connect shields to the GND connectors.
Shielded
twisted pair
9-pin screw-
type block,
Pin
Name
Description
1
R-
Right -
2
GND
Audio Ground
3
R+
Right +
4
L-
Left -
5
GND
Audio Ground
6
L+
Left +
ALARM
Connect to fault alarm system.
The Alarm Relay states shown on the rear panel are Power Off
and Fault state. When the CSR820 is powered on, the relay
state will change NC to Open and NO to Closed.
•
The Alarm Relay cable shield must be connected to one of
the Audio Ground pins (2 or 5).
Caution
: Relay maximum input power rating is
24 VDC,
1Amp
. Do not exceed the maximum power rating.
Shielded
9-pin screw-
type block
Pin
Name
Description
7
COM
Relay Common
8
NC
Normally Closed if unpowered or in fault state.
9
NO
Normally Open if unpowered or in fault state.
RELAY
Connect to external equipment. Relay connectors are opened
or closed by external software commands.
•
The Relay cable shield must be connected to pin 9.
Caution:
Relay maximum input power rating is
24 VDC,
1Amp
. Do not exceed the maximum power rating.
Shielded
9-pin screw-
type block
Pin
Name
Description
1
COM
Relay 1 Common
2
NO
Relay 1 Normally Open
3
COM
Relay 2 Common
4
NO
Relay 2 Normally Open
5
COM
Relay 3 Common
6
NC
Relay 3 Normally Closed
7
COM
Relay 4 Common
8
NC
Relay 4 Normally Closed.
9
GND
Relay 1-4 Shield Ground.
