Potter EVD-2 - Manual (Page 6)

6
EVD-2 • 5401042 • REV N • 6/09
EVD-M Controller
The EVD-M 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-M detects a large amplitude alarm source it signals an alarm. Small amplitude alarm sources must persist for
15 seconds before the EVD-M signals an alarm. Alarm contacts operate for a minimum of 2 seconds.
The EVD-M contains two sensitivity adjustments: one for EVD-M’s internal pickup, another one for a network of remote pickups. The EVD-M
controller supports up to 15 EVD-R remote pickups, (or may be used as a stand alone unit), and fully supervises EVD-R wiring. The EVD-M
signals wiring faults as alarms. A cover tamper and a back tamper protect the EVD-M from cover removal or prying. If either tamper on the
EVD-M activates or any remote pickup signals tamper, the EVD-M will signal a tamper alarm condition. Tamper alarm contacts operate for a
minimum of 2 seconds. If more than fi ve remote pickups signal a tamper condition, the EVD-M will signal an alarm. The internal pickup of the
EVD-M is always active, regardless of any tamper condition.
The model EVD-M controller provides a Form C, alarm contact for connection into the alarm protective circuit. Additionally, the EVD-M
provides an independent, Form A, tamper alarm contact which can be wired as a separate 24 hour alarm circuit or wired in series with the alarm
protective circuit. The EVD-M 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-M.
In addition to its remote test capability, the EVD-M provides a magnetically activated test switch that permits testing of the installation. The
EVD-M contains a multi-color LED to indicate system status. This status LED indicates several states:
Notes
1.
If both an alarm condition and a tamper 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-M contains a rotary switch that controls the EVD-M’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-M signals an alarm. This feature can be useful
for installing an EVD-2 system 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 and the remote pickups. If EVD-M has not detected
enough valid signals for an alarm and fi ve minutes pass after the last valid signal, the EVD-M resets the accumulator count to zero. As an aid to
installers, the EVD-M blinks its status LED for each valid accumulator signal that it detects. (This feature is only active while the EVD-M cover
is off and if the accumulator is activated, i.e.. during installation.) An analog test point provides signal level information to simplify installations.
Refer to Figure 1 for key component locations and terminal descriptions.
Figure 1 EVD-M Controller Details
ACCUMULATOR
ROTARY SWITCH
STATUS LED
MAGNETICALLY
ACTIVATED TEST
SWITCH
CABLE CLAMP
DWG# 1042-2
FIELD WIRING
TERMINAL BLOCK
(SEE NOTE 6)
ANALOG
TEST POINT
REMOTE PICKUP
NETWORK
SENSITIVITY
ADJUSTMENT
INTERNAL PICKUP
SENSITIVITY
ADJUSTMENT
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-M 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