Mercury Security © 2015
EP1502
DOC 10107-0031
REV 1.06
Page 6
9. Relay Circuit Wiring:
Four relays with Form-C contacts are provided for controlling door lock mechanisms or alarm signaling.
The relay contacts are rated at 5 A @ 30 Vdc, dry contact configuration. Each relay has a Common pole
(C), a Normally Open pole (NO) and a Normally Closed pole (NC). When you are controlling the delivery
of power to the door strike, the Normally Open and Common poles are used. When momentarily removing
power to unlock the door, as with a mag lock, the Normally Closed and Common poles are used. Check
with local building codes for proper egress door installation.
Door lock mechanisms can generate feedback to the relay circuit that can cause damage and premature
failure of the relay. For this reason, it is recommended that a diode be used to protect the relay. Wire
should be of sufficient gauge to avoid voltage loss.
10. Memory and Real Time Clock Backup Battery:
The static RAM and the real time clock are backed up by a lithium battery when input power is removed.
This battery should be replaced annually. If data in the static RAM is determined to be corrupt after power
up, all data, including flash memory, is considered invalid and is erased All configuration data must be re-
downloaded. Remove the insulator from the battery holder after installation. Battery type: BR2325,
BR2330, or CR2330.
11. IT Security
When installing the EP1502, it is important to ensure that it done in a secure manner.
Upon installation, the user accounts to the web configuration page should be created with secure
passwords, and that all DIP switches are in the off position for the normal operating mode. The EP1502
is shipped from the factory with a default login account, which is enabled when DIP 1 is moved from OFF
to ON. The default login user name and password will be available for five minutes once enabled.
Therefore, it is important that at least one user account is defined, and the DIP switches are set to OFF
before the EP1502 is commissioned. It is also highly recommended not to configure the EP1502 with an
IP address that is accessible from the public Internet.
To further enhance network security, options are available to disable SNMP, Zeroconf discovery, as well
as the web configuration module itself. Additionally, data encryption can also be enabled over the host
communication port.
12. Status LEDs:
Power-up:
All LED's
OFF
.
Initialization:
LED's 1, 2, 3, TMP, FLT, R1, R2, IN1, IN2, IN3, IN4, IN5, IN6, IN7 and IN8 are sequenced
during initialization. LED's 1, 3, and TMP are turned ON for approximately 4 seconds after the hardware
initialization has completed, then the application code is initialized. The amount of time the application
takes to initialize depends on the size of the database, about 3 seconds without a card database. Each
10,000 cards will add about 3 seconds to the application initialization. When LED's 1, 2, 3 and TMP flash
at the same time, data is being read from or written to flash memory, do not cycle power when in this
state.
Diode Selection:
Diode current rating: 1x strike current
Diode breakdown voltage: 4x strike voltage
For 12 Vdc or 24 Vdc strike, diode 1N4002
(100V/1A) typical.
