Pub. 42004-783L2C
SP2 Remote Subset/Speaker Amplifier Station
Page 11 of 20
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-783L2C.docx
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Power
The ac or optional dc power supply is mounted on the Termination PCBA. The termination PCBAs
include terminal block
TB3
for connecting the local power source to the station (see Figure 4):
1.
Pull the cable from the power source into the enclosure.
2.
Connect spade lugs to the wires.
3.
Connect the conductors from the ac or dc power source to the appropriate terminals at terminal block
TB3
:
Table 6. AC Power—TB3
Table 7. DC Power—TB3
Pin
Label
Description
Pin
Label
Description
TB3-1
LINE
Positive
TB3-1
+
Positive
TB3-2
NEUTRAL
Negative
TB3-2
−
Negative
TB3-3
⏚
Earth ground
TB3-3
No Connection
Main PCBA
600-Ohm Audio I/O with Control
SP2 stations provide a 600-ohm audio input to facilitate broadcasting line level audio over the page line.
A control input exists that requires a normally open dry contact closure to enable the station to broadcast
the 600-ohm input audio. SP2 stations also provide a 600-ohm audio output for sending page line audio
to a remote audio amplifier. A solid state dry contact relay is provided that can be used to control when
the remote audio amplifier plays the audio.
1.
Pull the cable for the 600-ohm audio I/O into the enclosure.
2.
Install ferrules onto the wire ends.
3.
Connect the 600-ohm audio wires to the pluggable terminal block for the 600-ohm audio I/O
connection (see Table 8 and Figure 9).
4.
Connect the pluggable terminal block to terminal block receptacle
TB1
.
Table 8. 600-Ohm Audio I/O Interface Connections—TB1
Pin
Label
Description
TB1-1
I
N
CT1+
Input Control Positive
TB1-2
I
N
CT1−
Input Control Negative
TB1-3
I
N
A
UD
+
Input Audio Positive
TB1-4
I
N
A
UD
−
Input Audio Negative
TB1-5
O
UT
A
UD
+
Output Audio Positive
TB1-6
O
UT
A
UD
−
Output Audio Negative
TB1-7
O
UT
CT1+
Output Control Positive
TB1-8
O
UT
CT1−
Output Control Negative