CONNECTOR PINOUTS
VORTEX EF2280 Reference Manual 60 Technical Support: 800.765.9266
C
ONNECTING
U
NBALANCED
RCA
TO
B
ALANCED
T
ERMINAL
B
LOCK
1. Connect RCA Tip to terminal block pin 1.
2. Connect RCA Ring to terminal block pin 2.
3. Connect terminal block pin 3 to Shield, and leave Shield floating on RCA
end.
M
AKING
AN
EF B
US
T
ERMINATOR
Instructions To make a terminator (for use when connecting legacy EF2280s with inline audio
connections), use an RJ45 connector. Connect pin 3 to pin 6 with an 110 Ohm resistor.
A terminator is not required for the EF2280’s with stacked audio connections as the
terminator is built-in.
Figure 31. Cable construction for connecting unbalanced RCA to balanced 3 conductor terminal block.
Red
Black
Red
Black
Shield
Tip
Ring
RCA Male
3.5 mm Terminal Block
Connector
2
1
3
+
-
Caution! Do NOT connect the shield at both ends.
Caution! On the EF2280, terminal block pin 3 is connected to
chassis ground. Under no circumstances should pin 3
be connected to pin 1 or to pin 2. Doing so will add
noise to the audio signal.
Figure 32. The EF Bus terminator
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