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2-Wire Audio Connections
NOTE: The SSA-424A features internal DC isolation. You
can therefore connect to the SSA-424A to powered TW
cables, and it will not draw any power from the TW system.
On the SSA-424A front panel: For System A and System
2.
B, set the 2W CHAN SEL switch to the appropriate
position. To interface to TW channel 1 select position 1;
for TW channel 2, select position 2.
NOTE: If the System A or System B will not be used, set the
2W CHAN SEL switch to the OFF position and attach a
dummy load to the TW XLR connector.
TW CABLE PIN-OUT
PIN 1 COMMON
PIN 2 CH 1
PIN 3 CH 2
TW-5W
AUX
SSA-424A
J4B
J3B
4 WIRE SYSTEM
FIGURE 3. Using a TW-5W to connect to two TW channels to the
SSA-424A
Audiocom Audio Connection
You can directly connect standard Audio 1-channel
1.
cables. Connect one Audiocom channel to the J1A
connector on the back of the SSA-424A (System A).
Connect a second Audiocom channel to the J1B
connector (System B). If your Audiocom system uses
2-channel cables, use a JB-2 Junction Box to split the
channels (Figure 4)
NOTE: The SSA-424A features internal DC isolation. You
can therefore connect the SSA-424A to powered Audiocom
cables, and it will not draw any power from the Audiocom
system.
On the SSA-424A front panel, set the 2W CHAN SEL
2.
switches for System A or System B to the BAL position.
NOTE: If System A or System B hybrid will not be used, set
the 2W CHAN SEL switch to the OFF position and attach a
dummy load to the TW XLR connector.
FROM RTS TW
INTERCOM SYSTEM
PUSH
Telex Communications, Inc., Made in U.S.A.
AUX
J5 POWER
+5V 3A
+15V 1.6A
-15V 0.3A
J4A
+5V
RTN
+15V
-15V
J1B
J1A
J2B
J2A
J3A
RTN
2 WIRE SYSTEM
4 WIRE SYSTEM
CH 1 AND 2
FROM AUDIOCOM
INTERCOM SYSTEM
1&2
LINES
CH 2
Telex Communications, Inc., Made in U.S.A.
AUX
J4B
J3B
J2B
4 WIRE SYSTEM
FIGURE 4. Using a JB-2 Junction Box to split a 2-channel
Audiocom cable into two 1-channel cables.
Clear-Com Audio Connection
Use standard Clear-Com 3-pin cables. Connect one
1.
Clear-Com party line to the J1A connector on the back of
the SSA-424A (System A). Connect a separate Clear-
Com party line to the J1B connector (System B).
NOTE: The SSA-424A features internal DC isolation. You
can therefore connect the SSA-424A to powered Clear-Com
cables, and it will not draw any power from the Clear-Com
system.
On the SSA-424A front panel, set the System A and
2.
System B 2W CHAN SEL switches to position 2.
NOTE: If the System A or System B hybrid will not be
used, set the 2W CHAN SEL switch to the OFF position and
attach a dummy load to the TW XLR connector.
Other 2-wire Audio Connection
Use the J1A connector on the back of the SSA-424A to
1.
connect one 2-wire line to the System A hybrid. Use the
J1B connector to connect a second 2-wire line to the
System B hybrid. The pin configuration for the J1A and
J1B connectors depend on whether you are connecting a
balanced or unbalanced 2-wire line, as follows:
JB-2
2
LINE
1
LINE
CH 1
SSA-424
AUX
J5 POWER
+5V 3A
+15V 1.6A
-15V 0.3A
J4A
+5V
RTN
+15V
-15V
J1B
J1A
J3A
RTN
J2A
2 WIRE SYSTEM
4 WIRE SYSTEM
7
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