GAI-Tronics 370-901 Manual - Página 8
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Model 370-901 SP2 to Page/Party
Channel Isolation Inputs—P3
Channel isolation inputs independently isolate SP2
multicast channel audio from each of the six
®
Page/Party
audio lines. Activation of an input
disconnects the SP2 and Page/Party
the bridge for that audio channel. This prevents audio
from traversing the bridge to the receiving system.
Terminate the six channel isolation inputs to terminal
block P3 (see Figure 4). P3 is a 12-position terminal
block. Six, two-position terminal plugs are used; one
for each channel isolation input. Complete the
termination as follows:
1. Pull the cable(s) for the channel isolation inputs
through the conduit and into the enclosure.
2. Install ferrules onto the wire ends.
3. Connect each channel pair to the two-position
pluggable terminal block for that channel (see
Figure 4 and Table 4).
4. Plug the six two-position pluggable blocks into
terminal block P3.
Contact Outputs—P4
®
The SP2 to Page/Party
Bridge is equipped
with six contact outputs (see Figure 4).
Outputs become active when a digital audio
signal is detected on the associated SP2
audio channel. These outputs may then be
used to actuate field devices when SP2
page or party-lines go off-hook.
The outputs are terminated at terminal
block P4. P4 is an 18 position terminal
block. Three-position pluggable terminal
blocks are used for each output to simplify
the connection of the outputs:
1. Pull the cable(s) for the contact outputs
through the conduit and into the
enclosure.
2. Install ferrules onto the wire ends.
3. Connect each set of output contact
wires to the appropriate three position
pluggable terminal block (see Figure 4
and Table 5).
4. Connect each three-position pluggable
terminal block to terminal block P4.
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-525A.docx
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®
Bridge
®
audio signals in
Output
Page
Line
Party
Line 1
Party
Line 2
Party
Line 3
Party
Line 4
Party
Line 5
PLn := Party Line 1..5
Table 4. Channel Isolation
Input Connections—P3
Channel
Label
Isolated
PG IN
Page Line
GND
PL1 IN
Party Line 1
GND
PL2 IN
Party Line 2
GND
PL3 IN
Party Line 3
GND
PL4 IN
Party Line 4
GND
PL5 IN
Party Line 5
GND
Table 5. Contact Outputs—P4
Label
Description
NC
normally closed page contact
COM
page output common
NO
normally open page contact
NC
normally closed PL1 contact
COM
PL1 output common
NO
normally open PL1 contact
NC
normally closed PL2 contact
COM
PL2 output common
NO
normally open PL2 contact
NC
normally closed PL3 contact
COM
PL3 output common
NO
normally open PL3 contact
NC
normally closed PL4 contact
COM
PL4 output common
NO
normally open PL4 contact
NC
normally closed PL5 contact
COM
PL5 output common
NO
normally open PL5 contact
Pub. 42004-525A
Page 6 of 16
Description
Page In +
Page In −
Party Line 1 +
Party Line 1 −
Party Line 2 +
Party Line 2 −
Party Line 3 +
Party Line 3 −
Party Line 4 +
Party Line 4 −
Party Line 5 +
Party Line 5 −