Hubbel GAI-TRONICS SP2 Fiber, Manual

Page: 10 / 27

Pub. 42004-790B
SP2 Fiber Class I Div. 2 Handset/Speaker Amplifier Station
Page 8 of 24
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70-V/100-V Termination Board Option—Speaker Connections with Monitoring
The optional 70-volt/100-volt speaker line-
monitoring PCBA replaces the standard
termination board and enables connection of
70-volt and/or 100-volt speakers to the SP2
station. Terminate the station’s speaker loop(s)
to terminal block
TB1. Wire all speakers in
parallel. One speaker loop can be monitored by
terminating the return cable to the
L
INE
S
PRVN
terminals at terminal block TB2 (see Figure 6
and Table 2).
1. Pull the 70-volt and/or 100-volt speaker
cable(s) into the enclosure.
2. Install spade lugs on the wires.
3. Connect 100-volt speakers between the
100V and COM terminals on TB1 .
Connect 70-volt speakers between the 70V
and
COM
terminals on
TB1
.
Two sets of terminals exist for the 70-volt
and 100-volt speaker loops, providing
termination for additional speaker loops.
N
OTE
: The station can only monitor one
speaker loop
4. For speaker line supervision, connect the
speaker return wires to the
L
INE
S
PRVN
+
and − terminals at TB2 (see Table 4).
5. Move jumper P2 to pins 2–3 to enable
ground fault monitoring.
6. Torque the terminal block screws to 8–10
in·lb (0.90–1.13 N·m).
N
OTE
: The combined wattage (tap settings)
for all speakers must never exceed the
amplifier power rating (24 W).
Table 2. 70 V/100 V Speaker Connections—TB1
Pin Label Description
TB1-1 100V 100 V Parallel Speakers—Output
TB1-2
COM
Common
TB1-3 70V 70 V Parallel Speakers—Output
TB1-4 100V 100 V Parallel Speakers—Output
TB1-5 COM Common
TB1-6 70V 70 V Parallel Speakers—Output
Figure 6. 70-V/100-V Termination PCBA