HID Mercury LP4502 User manual

HIDMercury™ LP4502 Controller
Installation and Specifications
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PLT-05246, A.4
June 2021
HIDMercury™ LP4502 Controller Installation and Specifications
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Powering
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Copyright
© 2020 - 2021 HID Global Corporation/ASSA ABLOY AB. All rights reserved.
This document may not be reproduced, disseminated or republished in any form without the prior written
permission of HID Global Corporation.
Trademarks
HID GLOBAL, HID, the HID Brick logo, the Chain Design, and HIDMercury are trademarks or registered
trademarks of HID Global, ASSA ABLOY AB, or its affiliate(s) in the US and other countries and may not be
used without permission. All other trademarks, service marks, and product or service names are trademarks
or registered trademarks of their respective owners.
Contacts
HID Global Technical Support: www.hidglobal.com/support.
Americas and Corporate Asia Pacific
611 Center Ridge Drive
Austin, TX 78753
USA
Phone: +1866 607 7339
19/F 625 King’s Road
North Point, Island East
Hong Kong
Phone: [phone]
Europe, Middle East, and Africa (EMEA) Brazil
3 Cae Gwyrdd
Green Meadow Springs
Cardiff CF15 7AB
United Kingdom
Phone: [phone]
Condomínio Business Center
Av. Ermano Marchetti, 1435
Galpão A2 - CEP 05038-001
Lapa - São Paulo / SP Brazil
Phone: [phone]
For additional offices around the world, see www.hidglobal.com/contact/corporate-offices.
What's new
Date Description Revision
June 2021 Minor updates. A.4
A complete list of revisions is available in Revision history.
PLT-05246, A.4 2 June 2021
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Installation and Specifications

Section 01
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Overview

1.1 LP4502 Intelligent controller with two reader interfaces
The LP4502 intelligent controller provides decision making, event reporting, and database storage for the
HID Mercury hardware platform. Two reader interfaces provide control for two doors.
Host communication is via the on-board 10Base T/100Base-TX Ethernet port, or the Micro USB port (2.0)
with an optional Micro USB to Ethernet adapter.
Two physical barriers can be controlled with the LP4502. Each reader port can accommodate a read-head
that utilizes TTL (D1/D0, Clock/Data), F/2F or 2-wire RS-485 electrical signaling (OSDP reader for example)
and also provides tri-state LED control and buzzer control (one wire LED mode only).
Four Form-C relay outputs are provided for door strike control or alarm signaling.
Eight inputs are provided for monitoring the door contacts, exit push buttons, and alarm contacts. Input
circuits can be configured as unsupervised or supervised.
The LP4502 requires 12 to 24 V DC for power.
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Installation and Specifications

1.2 LP4502 hardware
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Section 02
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LP4502 wiring and setup

2.1 LP4502 connections
TB1-1 GND Power fault input
TB1-2 FLT
TB1-3 GND Cabinet Tamper input
TB1-4 TMP
TB1-5 GND Power input
TB1-6 VIN: 12 to 24 V
DC
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TB2-1 GND SIO port 1 (2-wire RS-485)
TB2-2 TR- (A)1
TB2-3 TR+ (B)1
TB3-1 GND SIO port 2 (2-wire RS-485)
TB3-2 TR- (A)1
TB3-3 TR+ (B)1

TB4-1 IN2 Input 2
TB4-2 IN2
TB4-3 IN1 Input 1
TB4-4 IN1
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TB5-1 IN4 Input 4
TB5-2 IN4
TB5-3 IN3 Input 3
TB5-4 IN3
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TB6-1 IN6 Input 6
TB6-2 IN6
TB6-3 IN5 Input 5
TB6-4 IN5
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TB7-1 IN8 Input 8
TB7-2 IN8
TB7-3 IN7 Input 7
TB7-4 IN7
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TB8-1 GND Reader 1 - Ground
TB8-2 DAT/D0 Reader 1 - Data/Data 0/TR- (A)1
TB8-3 CLK/D1 Reader 1 - Clock/Data 1/TR+ (B)1
TB8-4 BZR Reader 1 - Buzzer
TB8-5 LED Reader 1 - LED
TB8-6 VO Reader 1 - Power

TB9-1 GND Reader 2 - Ground
TB9-2 DAT/D0 Reader 2 - Data/Data 0/TR- (A)1
TB9-3 CLK/D1 Reader 2 - Clock/Data 1/TR+ (B)1
TB9-4 BZR Reader 2 - Buzzer
TB9-5 LED Reader 2 - LED
TB9-6 VO Reader 2 - Power
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TB10-1 NO Out 1 - Normally open contact
TB10-2 C Out 1 - Common
TB10-3 NC Out 1 - Normally closed contact
TB10-4 NO Out 2 - Normally open contact
TB10-5 C Out 2 - Common contact
TB10-6 NC Out 2 - Normally closed contact
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TB11-1 NO Out 3 - Normally open contact
TB11-2 C Out 3 - Common contact
TB11-3 NC Out 3 - Normally closed contact
TB11-4 NO Out 4 - Normally open contact
TB11-5 C Out 4 - Common contact
TB11-6 NC Out 4 - Normally closed contact
1. Terms A & B are from the RS-485 standard.
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Installation and Specifications

2.1.1 Jumpers and jacks
The LP4502 processor hardware interface is configured using jumpers to setup the reader port power and
end of line termination.
Jumpers Set at Description
J2 N/A 10 Base-T/100Base-Tx Ethernet connection (Port 0).
J5 OFF Port 2 RS-485 EOL terminator is OFF.
ON Port 2 RS-485 EOL terminator is ON.
J7  Reader power select. See caution below.
12V 12 V DC at reader ports.
PASS VIN "Pass Through" to reader ports.
J6 N/A Micro USB port (2.0)
J8 N/A microSD card
J9 OFF Port 1 RS-485 EOL terminator is OFF.
ON Port 1 RS-485 EOL terminator is ON.
J10-1 N/A Remote Status LED #1.1
J10-2 N/A Remote Status LED #2.1
J10-3 N/A Remote Status LED #3.1
J10-4 N/A Remote Status LED #4.1
J19 OFF Backup battery is OFF.
ON Backup battery is ON. See Memory and real time clock backup battery
1. Observe polarity connection to LED. External current limiting is not required.
Caution: Install jumper J7 in the 12 V position ONLY if the input voltage (VIN) is greater than 20V DC. Failure
to do so may damage the reader or LP4502.
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2.1.2 DIP switches
The four switches on S1 DIP switch configure the operating mode of the LP4502 processor.
DIP switches are read on power-up except where noted. Pressing reset switch S2 causes the LP4502 to
reboot.
1 2 3 4 Definitions
OFF OFF OFF OFF Normal operating mode.
ON X OFF OFF After initialization, enable default User Name (admin) and Password (password). The
switch is read on the fly, a re-boot is not required. See IT security for additional
information.
OFF ON OFF OFF Use factory default communication parameters.
ON ON OFF OFF Use OEM default communication parameters. Contact system manufacture for details.
See Bulk erase configuration memory.
ON ON OFF OFF Bulk Erase prompt mode at power up. See Bulk erase configuration memory.
X X X ON Makes the LP4502 report and function like an EP4502. To be used in situations where
the host software has not been updated to support the LP series product line.
Note: All other switch settings are unassigned and are reserved for future use. X = don’t care.
Caution: In the factory or OEM default modes, downloaded configuration/database is not saved to flash
memory.
2.2 Factory default communication parameters
Interface 1 (NIC1)
Network: static IP address 192.168.0.251
Subnet mask 255.255.0.0
Default gateway 192.168.0.1
DNS server 192.168.0.1
Primary host port IP server, Data security: TLS if Available, port 3001, communication address: 0
Alternate host port Disabled
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Installation and Specifications

2.3 Bulk erase configuration memory
The bulk erase function can be used for the following:
nErase all configuration and cardholder database (sanitize board, less third party applications).
nUpdate OEM default parameters after OEM code has been changed.
nRecover from database corruption causing the LP4502 board to continuously reboot.
Note: If clearing the memory does not correct the initialization problem, contact Tech Support
([email protected]).
2.3.1 Bulk erase steps
1. Set S1 DIP switches 1 and 2 to ON, and 3 and 4 to OFF.
2. Apply power to the LP4502 board. LED 1 is on for about 15 seconds while LP4502 boots up.
3. Change DIP switches 1 or 2 to OFF Within 10 seconds after LEDs 1 and 2, and LEDs 3 and 4 start flashing
alternately at a rate of 0.5 seconds. If these switches are not changed, the LP4502 board will power up
using the OEM default communication parameters.
4. LED 2 will flash indicating that the configuration memory is being erased. Full memory erase takes up to
60 seconds.
5. When complete, only LEDs 1 and 4 will flash for about three seconds.
6. The LP4502 board will complete its initialization within two seconds after LEDs 1 and 4 stop flashing.
Caution: Do not remove power during the bulk erase process.
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Installation and Specifications

2.4 Input power, cabinet tamper and UPS fault input wiring
The LP4502 requires 12-24 V DC power. Locate power source as close to the unit as possible.
Connect power with minimum of 18 AWG wire. Connect the GND signal to earth ground in only ONE
LOCATION within the system! Multiple earth ground connections may cause ground loop problems and is
not advised.
Observe POLARITY on 12-24 V DC input!
There are two dedicated inputs for cabinet tamper and UPS fault monitoring. Normal (safe) condition is a
closed contact. If these inputs are not used, install a jumper wire.
2.5 Communication wiring
The LP4502 controller communicates with the host via the on-board Ethernet 10-BaseT/100Base-TX port
and/or the Micro USB port (2.0) with an optional Micro USB to Ethernet adapter.
The serial I/O device communication ports, TB2 for port 1 and TB3 for port 2, are 2-wire RS-485 interface
which can be used to connect additional I/O panels. The interface allows multi-drop communication on a
single bus of up to 4,000 feet (1,219 m). Use 1-twisted pair, shielded cable, 120Ω impedance, 24 AWG, 4,000
ft. (1,219 m) maximum for communication.
Caution: Install the termination jumper ONLY on the panel at each end of the RS-485 bus. Failure to do so will
compromise the proper operation of the communication channel.
Port 1 to serial I/O devices Port 2 to serial I/O devices
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Installation and Specifications

2.6 Reader wiring
Each reader port supports a reader with TTL (D1/D0, Clock/Data), F/2F (standard or supervised), or 2-wire
RS-485 signaling (OSDP reader for example). Power to the reader is selectable: 12 V DC (VIN must be greater
than 20 V DC), or power is passed-through (PASS) from the input voltage of the LP4502 (TB1-VIN) and is
current limited to 300 mA for each reader port. Readers that require different voltage or have high current
requirements should be powered separately. Refer to the reader manufacture specifications for cabling
requirements. In the 2-wire LED mode the Buzzer output is used to drive the second LED. Reader port
configuration is set via the host software. Do not terminate any RS-485 devices connected to a reader port.
To fully utilize each reader port:
nTTL signaling requires a 6-conductor cable (18 AWG)
nF/2F signaling requires a 4-conductor cable
nRS-485 signaling requires two 2-conductor cables. Use one cable for power (18 AWG, 1-pair) and one
cable for communication (24 AWG, 1-pair, shielded)
Note: For OSDP cable lengths greater than 200 ft (61 m) or EMF interference, install 120Ω +/- 2Ω resistor
across RS-485 termination ends.
Note: Data 0 and Data 1 wires for Wiegand may be reused for OSDP. However, standard Wiegand cable may
not meet RS-485 twisted pair recommendations. The reuse of cable works best on shorter cable
lengths at lower data rates.
J7 – Reader power select
12V PASS Reader power
12 V DC is available on reader ports (VIN > 20 V DC)
VINpower is "passed through" to reader ports
Caution: Install jumper J7 in the 12V position ONLY if the input voltage (VIN) is greater than 20VDC. Failure
to do so may damage the reader or LP4502.
Input power Reader power select Reader output Notes
24 V DC Pass-through 24 V DC 
24 V DC 12 V DC 12 V DC 
12 V DC Pass-through 12 V DC 
12 V DC 12 V DC 0 V DC Caution: Do not use
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Installation and Specifications

Typical reader 1
(OSDP installation)
Typical reader 1
(Wiegand or Clock/Data installation)
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Typical reader 2
(OSDP installation)
Typical reader 2
(Wiegand or Clock/Data installation)
 
Typical unsupervised F/2F reader Typical supervised F/2F reader
Jumper D1 to LED on supervised F/2F reader
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Installation and Specifications

2.7 Input circuit wiring
There are eight inputs that are typically used to monitor door position, request to exit, or alarm contacts.
Input circuits can be configured as unsupervised or supervised. When unsupervised, reporting consists of
only the open or closed states. When configured as supervised, the input circuit will report not only open and
closed, but also open circuit, shorted, grounded*, and foreign voltage*. A supervised input circuit requires
two resistors be added to the circuit to facilitate proper reporting. The standard supervised circuit requires
1kΩ, 1% resistors and should be located as close to the sensor as possible. Custom end of line (EOL)
resistances may be configured via the host software.
*Grounded and foreign voltage states are not a requirement of UL 294 and therefore not verified by UL.
The input circuit wiring configurations shown are supported but may not be typical:
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Installation and Specifications

2.8 Relay circuit wiring
Four relays with Form-C contacts (dry) are provided for controlling door lock mechanisms or alarm signaling.
Each relay has a Common pole (C), a Normally Open pole (NO) and a Normally Closed pole (NC). When
controlling the delivery of power to the door strike, the Normally Open and Common poles are typically used.
When momentarily removing power to unlock the door, as with a mag lock, the Normally Closed and
Common poles are typically 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, and affect the operation of the LP4502. For this reason, it is recommended that a diode is
used to protect the relay. Wire should be of sufficient gauge to avoid voltage loss.

Diode selection
nDiode current rating: 1x strike current.
nDiode breakdown voltage: 4x strike voltage.
nFor 12 V DC or 24 V DC strike, diode 1N4002 (100V/1A) typical.
2.9 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.
During installation and while the unit is not powered, change the jumper position (J19) from OFF to ON to
enable the battery backup.
Battery type: BR2330 or CR2330.
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2.10 Status LEDs
2.10.1 Power-up
All LEDs are OFF.
2.10.2 Initialization
After power is applied or reset switch pushed, LED 1 is ON for about 15 seconds, then LEDs 2, 3, 4, 5, 6, R1, R2,
IN1, IN2, IN3, IN4, IN5, IN6, IN7 and IN8 are flashed once at the beginning of initialization. LEDs 3 and 4 is
turned ON for approximately 1 second 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 1 second without a card database. Each 10,000 cards will add about 2 seconds to the application
initialization. When LEDs 1, 2, 3 and 4 flash at the same time, data is being read from or written to flash
memory, do not cycle power when in this state. If the sequence stops or repeats, perform the bulk erase
procedure, see Bulk erase configuration memory.
2.10.3 Running
After initialization is complete, the LEDs have the following meanings:
LED Description
1Off-line / On-line and battery status
Off-line = 20% ON, On-line = 80% ON
Double flash if battery is low
2Host communication activity (Ethernet)
3Internal SIO communication activity
4External SIO communication activity (Port 1)
5External SIO communication activity (Port 2)
R1 Reader 1: Clock/Data or D1/D0 Mode = Flashes when data is received, either input.
F/2F mode: Flashes when data/acknowledgment is received
RS-485 mode = Flashes when transmitting data
R2 Reader 2: Clock/Data or D1/D0 Mode = Flashes when data is received, either input.
F/2F mode: Flashes when data/acknowledgment is received
RS-485 mode = Flashes when transmitting data
YEL Ethernet speed: OFF = 10Mb/S, ON = 100Mb/S
GRN OFF = No link, ON = Good link, Flashing = Ethernet activity
D16 Ethernet activity
IN1 Input IN1 status: OFF = Inactive, ON = Active, Flash = Fault1
IN2 Input IN2 status: OFF = Inactive, ON = Active, Flash = Fault1
IN3 Input IN3 status: OFF = Inactive, ON = Active, Flash = Fault1
IN4 Input IN4 status: OFF = Inactive, ON = Active, Flash = Fault1
IN5 Input IN5 status: OFF = Inactive, ON = Active, Flash = Fault1
IN6 Input IN6 status: OFF = Inactive, ON = Active, Flash = Fault1
IN7 Input IN7 status: OFF = Inactive, ON = Active, Flash = Fault1
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LED Description
IN8 Input IN8 status: OFF = Inactive, ON = Active, Flash = Fault1
K1 Relay K1: ON = Energized
K2 Relay K2: ON = Energized
K3 Relay K3: ON = Energized
K4 Relay K4: ON = Energized
1. If this input is defined, every three seconds the LED is pulsed to its opposite state for 0.1 seconds, otherwise, the LED is off.
2.11 IT security
Ensure that the LP4502 is installed securely. Create user accounts to the web configuration page using
secure passwords.
Ensure all DIP switches are to be in the OFF position for the normal operating mode.
The LP4502 is shipped from the factory with a default login account, which is enabled when DIP 1 is moved
from OFF to ON (See DIP switches). The default login user name (admin) and password (password) will be
available for five minutes once the DIP switch is toggled. It is therefore important that at least one user
account is defined, and the DIP switches are set to OFF before the LP4502 is commissioned.
Configuring the LP4502 with an IP address that is accessible from the public is not recommended.
The following options are available for enhanced network security:
nDisable SNMP.
nZeroconf discovery.
nThe web configuration module.
nEnable data encryption over the host communication port.
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Installation and Specifications

Section 03
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Specifications

The LP4502 is for use in low voltage, Class 2 Circuits only
The installation of this device must comply with all local fire and electrical codes.
Primary power 12 to 24 V DC ± 10 %, 550 mA maximum (reader and USB current not included)
Reader ports 600 mA maximum (add 600 mA to primary power current)
Micro USB port 5 V DC, 500 mA maximum (add 270 mA to primary power current)
Memory and clock backup
battery
3 Volt Lithium, type BR2330 or CR2330
microSD card Format: microSD or microSDHC; 2GB to 8GB.
Host communication Ethernet: 10Base T/100Base-TX and micro USB port (2.0) with optional adapter:
pluggable model USB2-OTGE100
Serial I/O device Two each: 2-wire RS-485, 2,400 to 115,200 bps, asynchronous, half-duplex, 1 start bit, 8
data bits, and 1 stop bit
Inputs Eight unsupervised/supervised, standard EOL: 1k/1kΩ, 1%, ¼ watt
Two unsupervised dedicated for cabinet tamper and UPS fault monitoring
Output Four relays, Form-C with dry contacts
Normally open contact (NO): 5 A @ 30 V DC resistive
Normally closed contact (NC): 3 A @ 30 V DC resistive

Reader interface
Power
(jumper selectable)
12 V DC ± 10% regulated, 300 mA maximum each reader
(input voltage (VIN) must be greater than 20 V DC)
or
12 to 24 V DC ± 10% (input voltage (VIN) passed through), 300 mA maximum each
reader
Data inputs TTL compatible, F/2F or 2-wire RS-485
RS-485 mode 9,600 to 115,200 bps, asynchronous, half-duplex, 1 start bit, 8 data bits, and 1 stop bit.
Maximum cable length: 2000 ft. (609.6 m)
LED output TTL levels, high>3 V, Low<0.5 V, 5 mA source/sink maximum
Buzzer output Open collector, 12 V DC open circuit maximum, 40 mA sink maximum

Cable requirements
Power and relays 1 twisted pair, 18 to 16 AWG
Ethernet CAT-5, minimum
Reader data (TTL) 6-conductor, 18 AWG, 500 feet (150 m) maximum
Reader data (F/2F) 4-conductor, 18 AWG, 500 feet (150 m) maximum
Reader data (RS-485) 1 twisted pair, shielded. 24 AWG, 120Ω impedance, 2,000 feet (610 m) maximum
RS-485 I/O devices 1 twisted pair, shield. 120Ω impedance, 24 AWG, 4,000 ft. (1,219 m) maximum
Alarm input 1 twisted pair, 30Ω maximum, typically 22 AWG @ 1000 ft. (304.8 m)

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Installation and Specifications