Pub. 42004-790B
SP2 Fiber Class I Div. 2 Handset/Speaker Amplifier Station
Page 11 of 24
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Power
The ac or optional dc power supply is on the termination PCBA. Connect the local ac or dc power source
to terminal block
TB3
(see Figure 4, Figure 5, and Figure 6):
1.
Pull the cable from the power source into the enclosure.
2.
Install spade lugs on the wires.
3.
Connect the ac (see Table 6) or dc (see Table 7) power source conductors to terminal block
TB3
.
4.
Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
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 have a 600-ohm audio input to broadcast line level audio over the page line. The station
broadcasts the 600-ohm input audio stream upon closure of a normally open dry contact input control.
SP2 stations also provide a 600-ohm audio output to send page line audio to a remote audio amplifier. A
solid-state dry contact relay controls when the remote 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
