Adjuncts and Peripherals
Paging and announcement equipment
SI Installation and Upgrades 841
June 2004
Loudspeaker paging access without universal
coupler
1
Determine port assignment of paging zone(s) from loudspeaker paging form.
2 At the main distribution frame, locate the connecting block and terminals assigned to the selected
port.
3 On the locally engineered wiring block, place a strap between terminals S and SZ. Place a strap
between terminals S1 and SZ1.
4 Install patch cord/jumper wires at the main distribution frame.
5 Connect a 2-pair line cord (modular plug at one end) from the information outlet to the paging
amplifier (to the loudspeaker system).
6 Install loudspeaker equipment according to the manufacturer’s instructions.
7 Administer the switch for the new equipment.
Loudspeaker paging with universal coupler
An information outlet provides access to loudspeaker paging. The system side of the main distribution
frame connects to a 909A/B universal coupler. Make provisions for the DC power that the 909A/B
universal coupler requires, such as a 1151A, 1151A2, or other approved -48VDC power supply.
Six leads (T, R, SZ, SZ1, S, and S1) connect the adapter to an auxiliary trunk circuit pack located in a port
carrier.
1 Determine port assignment of paging zone(s) from loudspeaker Paging form.
2 Identify carrier slot and label both ends of an A25D (male to male) cable.
3 Connect a cable from the 909A/B to the system side of the main distribution frame. A wiring
block must be locally engineered.
4 909A/B universal coupler on page 831 provides details of the connections between the 909A/B
universal coupler and the wiring blocks.
CAUTION:
Damage to the 909A/B may occur if the cable is plugged into J3 before all cross-connects
are completed.
5 On the 909A/B universal coupler:
• Connect seizure control voltage of from -9 to -70 volts to the PG2/BZ2 connection (pin 2
of J1). Switching voltage to the PG2/BZ2 connection can be from the 909’s -48-volt
supply.
• Connect a -48 VDC power source to the -48 and GRD terminals on the 909A/B.
6 Install patch cord/jumper wires at the main distribution frame.
7 Connect a 2-pair line cord (modular plug at one end) from the information outlet to the
loudspeaker system.
8 Install loudspeaker equipment according to the manufacturer’s instructions.
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