Instantaneous Alarm Output

TM 5-6350-262-14/5

NAVELEX 0967-466-9050

TO 31S9-4-38-1

of relay A10K2 in the following manner: From S3 pin 2-3

functions are discussed in the following paragraphs.

through diode CR2, S5-4, S5-5, and to J10-L. If the operating

mode switch is at ACCESS, unregulated 27.5 volts dc is

c. Instantaneous Alarm Output. When a tamper alarm signal

applied to the coil of relay A10K2 from connector pin J8-17,

is received, instantaneous alarm module A9 immediately

through diode CR1, switch S5 pin 4 to 5, and to connector pin

provides an alarm signal to control unit output terminal board

J10-L. Signals from the tamper alarm buss are fed through

S; and, in the test/reset operating mode an internal buzzer is

audible alarm module A8 (pins JS8-11 to -8) and applied to a

sounded to alert using personnel of receipt of an alarm. Each

silicon controlled rectifier switch through connector pin J10-7

of these functions are discussed in the following paragraphs.

for control of relay A10K2. A no-alarm input signal (0 volts) at

connector pin J10-7 has no affect on the SCR switch circuit,

(1) Instantaneous Alarm. Signals from the tamper

therefore relay A10K2 remains in the restored position. In this

alarm buss are applied to a 10-second instantaneous alarm

condition a low impedance of 0 to 2000 ohms exists between

timing circuit on module A9 via J910. The contacts of relay

output connector pins J10-9 and -10. This no-alarm signal is

A9K1 are in the position shown in figure 6-1 for a no-alarm (0

fed to latched alarm output terminals S1-D and -DR. From

volts) input. In this condition a low impedance of 0 to 2000

J10-9 the signal is routed through the normally closed

ohms exists between output connector pins J9-14 and -U.

contacts of relays A9K1, A10K4, A9K2, and A9K3 before

This no-alarm signal is routed from J9-14 to J10-14 through

being applied to terminal S1-D. A tamper alarm signal (20

the normally closed contacts of relay A10K4, and out J10-12.

volts dc) applied to connector pin J10-7 causes the SCR

A tamper alarm signal (20 volts dc) input activates the 10-

switch to turn on and relay A10K2 to operate. With relay

second instantaneous alarm circuit. When activated the one-

A10K2 operated, an impedance greater than 100,000 ohms

shot timing circuit provides a return path to the ground buss

exists between output connector pins J10-9 and -10. This

for the 20 volts dc applied to the coil of relay A9K1 and

tamper alarm signal is applied to control unit latched alarm

causes it to operate for 10 2 second. When relay A9K1 is

output terminals S1-D and -DR concurrent with the

operated, a high impedance tamper alarm signal of greater

instantaneous alarm output. The latched alarm output signal

than 100,000 ohms is present between connector pins J9-14

will remain until relay A10K2 is restored by turning operating

and -U. If the tamper alarm signal input is still present after

mode switch S3 to TEST/RESET then back to SECI. RE or

the 10-second time period, the instantaneous alarm output

ACCESS. If operating mode switch S3 is at TEST/RESET

signal will continue until the alarm input disappears.

when the tamper alarm is receive(l, a normal latched output

Instantaneous no-alarm/alarm signals are applied between

on terminals S1-D and -DR is inhibited. In this operating

terminals S1-I and -IR of control unit output terminal board.

mode a 10second alarm is applied to latched output terminals

Instantaneous alarms are output in all operating modes:

S1-I) and -DR to replace the normal latched output. From pin

secure, test/reset, access, latch, and non-latch.

2-2 of switch S3, 20 volts dc is fed through connector pin J9-3

and applied to the coil of relay A9K2. A 20-volt tamper alarm

(2) Sonalert. Plus 20 volts dc is applied to sonalert

input signal activates the 10-second timing circuit which

buzzer DS2 when operating mode switch S3 is in the

connects the return side of relay coil A9K2 to the ground buss.

TEST/RESET position. The buzzer dc return is connected

With relay A9K2 operated, an impedance greater than

through J8-13 to a transistor switch on audible alarm module

100,000 ohms exists between connector pins J9-B and -4.

AS. When the 10-second instantaneous alarm circuit is

This 10-second tamper alarm signal is applied to latched

activated by a tamper alarm signal as described in the

alarm output terminals S1-D and -DR concurrent with the

previous paragraph, 5 volts dc is fed through connector pin

instantaneous alarm output.

J9-R to J8-14 and applied to the transistor switch. The 5 volts

dc causes the transistor to conduct thereby switching the

(2) Non-Latched Alarm. If LATCH/NON LATCH

return side of buzzer DS2 to the ground )buss. The buzzer

switch S5 is in the NON LATCH position, 20 volts dc is not

will sound for 10 2 seconds, until the tamper alarm input

applied to the coil of relay A10K2 to latch a tamper alarm

signal is removed, or until operating mode switch S3 is moved

output signal. In the non-latch operating mode, 20 volts dc

from TEST/RESET.

from

S5-2

routed

connector

d. Latched Alarm Output. The latched alarm outputs consist

of latched or non-latched signals applied to output terminal

board S and an audible alarm output fed to terminal board L2.

These outputs and their duration are dependent upon the

position of switches S3 and S5.

(1) Latched Alarm. When a tamper alarm signal is

received, an instantaneous latched alarm output signal is

supplied by latched alarm module A10 if the control unit

operating mode switch S3 is in either the normal SECURE

position or at ACCESS and switch S5 is in the LATCH

position. In the secure mode, 20 volts dc is applied to the coil

6-6