wheelock PRM-150 INSTALLATION INSTRUCTIONS
273 Branchport Avenue
G
Long Branch, NJ 07740 Thank you for using our products.
(800) 631-2148 INSTALLATION INSTRUCTIONS
www.wheelockinc.com PREAMPLIFIER MODULE
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
MODEL NUMBER: PRM-150
FCC REGULATIONS:
This equipment complies with Part 68 of the FCC Rules. On the back of this equipment is a label that contains, among other
information, the FCC Registration Number and the Ringer Equivalence Number (REN) for this equipment. You must, upon request,
provide this information to your telephone company.
The REN is also useful to determine the quantity of devices that you may connect to your telephone line and still have all of those
devices ring when your telephone number is called. In most, but not all areas, the sum of the REN's of all devices connected to one
line should not exceed five (5.0). To be certain of the number of devices that you may connect to your line, you may want to contact
your local telephone company.
Should the equipment cause harm to the telephone network, the telephone company shall, if possible, notify the customer that
temporary discontinuance of service may be required. However, where prior written notice is not possible, the telephone company
may temporarily discontinue service without notice, if such action is necessary under the circumstances. The telephone company may
make changes in its communication facilities, equipment and operations procedures, where such action is reasonably required in the
operation of its business and is not inconsistent with the rules and regulations of the Federal Communications Commission.
Do not attempt to repair or modify this equipment. Repairs to this product will be performed by Wheelock Inc., 273 Branchport Ave.,
Long Branch, NJ 07740, in accordance with Wheelock's Inc. published Terms and Conditions of Sale. This equipment should not be
used on coin telephone lines. Connection to party line service is subject to state tariffs.
If trouble is experienced, disconnect this equipment from the telephone line to determine if it is causing the malfunction. If the
equipment is determined to be malfunctioning, its use shall be discontinued until the problem has been corrected.
GENERAL:
READ THESE INSTRUCTIONS CAREFULLY BEFORE USING THIS PRODUCT.
NOTE: All CAUTIONS and WARNINGS are identified by the symbol
. All warnings are printed in bold capital letters.
The PRM-150 is designed to amplify levels from an audio source and provide the output to drive up to 150 speaker amplifiers. It is
also designed to boost audio levels to compensate for signal lost on long cable runs. When the volume control knob is set at 5 the
output signal level is equal to the input signal level.
CAUTION: These devices are not intended for use in hazardous locations as defined by the National Electrical Code (NEC) and
by the National Fire Protection Association (NFPA).
PRM-150
INPUT FROM AN
AUDIO SOURCE
(600 OHM)
Copyright 2002 Wheelock, Inc. All rights reserved.
5
4
6
T
3
2
1
0
ND -24V
T
7
8
9
10
OUTPUT TO
SPEAKER AMPLIFIERS
RR
(4 OHM)
Figure 1: Simplified Connections
P81537 G
Sheet 1 of 5
AUDIO
PAGE
PORT
600 (OHM)
T
R
T-IN
PRM-150
R-IN
T-OUT
R-OUT
EKSU
OR
PABX
GND -24V
GND -24V
UP TO 150 SPEAKER AMPLIFIERS
GND -24V
Figure 2.
One-way paging with a PRM-150 connected directly to a 600 OHM CO or page port. If the telephone system provides one or more
600 OHM page ports, then a PRM-150 is required for each port.
WHEELOCK
ZC-3
UNUSED
C.O.
PORT
EKSU
OR
PABX
ZONE CONTROL
T
R
T
R
ZONE 1
ZONE 2
ZONE 3
T-IN
R-IN
T-IN
R-IN
T-IN
R-IN
PRM-150
PRM-150
PRM-150
T-OUT
R-OUT
GND -24V
T-OUT
R-OUT
GND -24V
T-OUT
R-OUT
GND -24V
UP TO 150 SPEAKER
AMPLIFIERS PER ZONE
GND -24V
GND -24V
GND -24V
Figure 3.
One-way paging with a Wheelock ZC-3 Zone Control. When connecting over 10 amplified speakers to the ZC-3, it may be necessary
to connect Wheelock PRM-150 line preamplifiers to the zone outputs. Depending upon system configuration (i.e., quantity of
speakers, length of wire runs, and audio output level of the host telephone system), it may also be necessary to use PRM-150's with
less than 10 amplified speakers. 24VDC connection (not shown) is required for each PRM-150, and the ZC-3.
UNUSED
C.O.
PORT
R
T
T-IN
R-IN
PRM-150
T-OUT
R-OUT
EKSU
OR
PABX
(+)
RPS-2406
POWER
SUPPLY
GND -24V
SPARE
(-)
GND -24V
UP TO 150 SPEAKER AMPLIFIERS
GND -24V
Figure 4.
One-way single zone paging from an unused CO port. This application is used only when external talk battery is required, otherwise,
use Figure 2.
P81537 G
Sheet 2 of 5
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