Pub. 42004-525A
Model 370-901 SP2 to Page/Party
®
Bridge
Page 6 of 16
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-525A.docx
08/18
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
®
audio signals in
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
.
Table 4. Channel Isolation
Input Connections—P3
Channel
Isolated
Label
Description
Page Line
PG
IN
Page In +
GND
Page In −
Party Line 1
PL1
IN
Party Line 1 +
GND
Party Line 1 −
Party Line 2
PL2
IN
Party Line 2 +
GND
Party Line 2 −
Party Line 3
PL3
IN
Party Line 3 +
GND
Party Line 3 −
Party Line 4
PL4
IN
Party Line 4 +
GND
Party Line 4 −
Party Line 5
PL5
IN
Party Line 5 +
GND
Party Line 5 −
Table 5. Contact Outputs—P4
Output
Label Description
Page
Line
NC
normally closed page contact
COM
page output common
NO
normally open page contact
Party
Line 1
NC
normally closed PL1 contact
COM
PL1 output common
NO
normally open PL1 contact
Party
Line 2
NC
normally closed PL2 contact
COM
PL2 output common
NO
normally open PL2 contact
Party
Line 3
NC
normally closed PL3 contact
COM
PL3 output common
NO
normally open PL3 contact
Party
Line 4
NC
normally closed PL4 contact
COM
PL4 output common
NO
normally open PL4 contact
Party
Line 5
NC
normally closed PL5 contact
COM
PL5 output common
NO
normally open PL5 contact
PL
n
:= Party Line 1..5
