Potter EVD-1 - Manual (Page 6)

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EVD-1 • 5401043 • REV M • 9/07
Figure 1. EVD-1 Controller Details
EVD-1 Controller
The EVD-1 controller is a microprocessor controlled, vibration detector that incorporates advanced detection methods for identifying all
common types of attacks. It detects short duration, large amplitude signals like those produced in attacks from explosions, hammering or
chiseling. It also detects long duration, small amplitude signals like those produced in attacks from torches, thermic lances, drills, grinders or
cutting discs. As soon as the EVD-1 detects a large amplitude alarm source it signals an alarm. Small amplitude alarm sources must persist for
15 seconds before the EVD-1 signals an alarm. Alarm contacts operate for a minimum of 2 seconds.
The EVD-1 contains a sensitivity adjustment in its internal pickup. A cover tamper and a back tamper protect the EVD-1 from cover removal or
prying. If either tamper on the EVD-1 activates, the EVD-1 will signal a tamper alarm condition. Tamper alarm contacts operate for a minimum
of 2 seconds. The internal pickup of the EVD-1 is always active, regardless of any tamper condition.
The model EVD-1 controller provides a Form C, alarm contact for connection into the alarm protective circuit. Additionally, the EVD-1
provides an independent, Form A, tamper alarm contact which can be wired as a separate circuit or wired in series with the alarm protective
circuit. The EVD-1 includes accessory terminals for an alarm condition remote annunciator, a tamper alarm remote annunciator, and a remote
test input. The remote test input terminal permits the connection of dry contacts from any Underwriters Laboratories listed central station test
unit. The remote test annunciator, model RTA, provides a normally open test switch and alarm and tamper alarm annunciators that interface
directly to the accessory terminals of the EVD-1.
In addition to its remote test capability, the EVD-1 provides a magnetically activated test switch that permits testing of the installation. The
EVD-1 contains a multi-color LED to indicate system status. This status LED indicates three states:
Notes
1.
If both an alarm condition and a tamper alarm condition exist, the status LED will indicate RED for the alarm. The remote annunciators and
the alarm and tamper alarm contacts will indicate both alarm and tamper alarm conditions.
2. If the microprocessor fails, the status LED will blink RED and both the alarm and tamper alarm contacts will be activated.
Accumulator Function
The EVD-1 contains a rotary switch that controls the EVD-1’s accumulator setting. This accumulator, when activated, accumulates impact
events. When the number of valid signals matches the setting on the rotary switch, the EVD-1 signals an alarm. This feature can be useful for
installing an EVD-1 where some noise is normal. The accumulator is only active when the rotary switch setting is NOT zero. The threshold for
valid signals is controlled by the sensitivity settings for the internal pickup. If the EVD-1 has not detected enough valid signals for an alarm
and fi ve minutes pass after the last valid signal, the EVD-1 resets the accumulator count to zero. As an aid to installers, the EVD-1 blinks its
status LED for each valid accumulator signal that it detects. (This feature is only active while the EVD-1 cover is off and if the accumulator is
activated, ie. during installation.) An analog test point provides signal level information to simplify installations.
Refer to Figure 1 for key component locations and terminal descriptions.
INTERNAL
PICKUP
SENSITIVITY
ADJUSTMENT
ANALOG
TEST POINT
FIELD WIRING
TERMINAL
BLOCK (SEE
NOTE 5)
DWG# 1043-2
CABLE CLAMP
MAGNETICALLY
ACTIVATED TEST
SWITCH
STATUS LED
ACCUMULATOR
ROTARY
SWITCH RV1
S1
TP1
If the main burglar panel has ground fault detection circuitry, it
may be necessary to power the EVD from a separate power supply,
not from the auxiliary power on the burglar panel. Alternately, the
safe may be insulated from ground.
EVD-1 Status Status LED Color Alarm Contacts Tamper Alarm Contacts
Normal Green Inactive Inactive
Tamper Amber (1) Inactive Active
Alarm Red (2) Active Inactive or active (1)
No power Off Active Active