Wheelock PS-11A, Installation Instructions

P80945 N 

Sheet 2 of 3 

GENERAL INFORMATION: 

The Telstrobe is a self-contained, plug-in strobe signal that emits a high-intensity flashing light when the telephone rings.  The strobe 
is designed for use in single-party (private) lines.  It responds to any ring signal within a frequency range of 20-30Hz and a voltage 
range of 45-130VRMS.  A minimum one second ring time is required for the ringing voltage to produce approximately two flashes 
per second from the strobe. 

MOUNTING INFORMATION: 

The Telstrobe is designed for mounting to indoor structures such as walls, partitions or posts.  Locate the strobe as desired for 
visibility and connect it as shown in the sketch below.  Note that the mounting screws supplied with each unit must be spaced as 
indicated.  The strobe hangs securely on the screw heads by means of key holes on the back of the unit.  Connect the strobe's six foot 
power cord to a 115VAC outlet.  Connect a standard modular telephone line cord (not supplied) from a spare telephone jack to the 
jack on the strobe.  The modular cord is typically 7 foot in length with a RJ-11C modular jack in the USA or a CA-11 modular jack in 
Canada.  The Telephone Strobe is now ready to operate.  Test the installation by having someone ring your number to make sure that 
the strobe flashes properly. 
 

SPECIFICATIONS: 

Strobe Circuit Specifications: 

     Nominal 

input 

voltage: 

   115VAC, 

60Hz 

     Input 

voltage:       96-132VAC, 

60Hz 

     Current 

draw:       0.080 

AMPS 

at 

115VAC 

     Peak 

Candlepower:     70,000 

peak 

candlepower 

     Nominal 

flash 

rate:     Two 

flashes 

per 

second 

     Input 

power 

cord: 

     Six 

foot 

long 

with 

2-blade 

plug 

Control Circuit Specifications 

     Nominal 

input 

voltage: 

   90VRMS, 

20-30Hz 

     Input 

voltage 

limits: 

    45-130VRMS, 

20-30Hz 

          Ringer equivalence ratings:    0.4, 1.0B (0.005 AMPS at 90V, 20Hz) 
     Voice 

Impedance: 

     500K 

OHMS 

@ 

400Hz, 

3VRMS 

                 100K 

OHMS 

@ 

20KHz, 

3VRMS 

     DC 

impedance: 

      Virtually 

infinite 

(blocking 

capacitor) 

     Duty 

cycle:        33% 

max. 

with 

10 

second 

maximum 

on 

time 

     Input 

jack:        USOC 

RJ11C, 

type 

623: 

pin 3 = ring/red, 

                                  pin 4 = tip/green 

MODULAR
TELEPHONE
LINE CORD

WALL JACK

MODULAR

TYPE 267

DUPLEX JACK *

TO TELEPHONE

IF SPARE WALL JACK IS NOT AVAILABLE.

* USE DUPLEX JACK (NOT SUPPLIED)

CORD

POWER

6-FOOT

OUTLET

STROBE

TELEPHONE

PS-11A

115VAC

2"

Figure 1. 

Figure 2. 

Template for spacing mounting screws (provided)