General

The LNL-M4420 intelligent controller provides decision making, event reporting, and database storage for the LenelS2 hardware platform. Two reader interfaces provide control for two doors.

The LNL-M4420 communicates with the host via 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 LNL-M4420. 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 may be used 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 LNL-M4420 requires 12 to 24 VDC for power.

LNL-M4420 Hardware

Jumpers and Jacks

The LNL-M4420 processor hardware interface is configured using jumpers to set up the reader port power and end of line termination.

* For regulated reader output, install J503 jumper link in the 12V position (1 and 2) ONLY if the input voltage (VIN) is greater than 17 VDC. Failure to do so may damage the reader or LNL-M4420.

** Observe polarity connection to LED. External current limiting is not required.

DIP Switches

The four switches on SW1400 DIP switch configure the operating mode of the LNL-M4420 processor. DIP switches are read on power-up except where noted.

Pressing reset switch SW400 causes the LNL-M4420 to reboot.

X = ON or OFF. All other switch settings are unassigned and reserved for future use.

* In the factory or LenelS2 default modes, downloaded configuration/database is not saved to flash memory.

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

Bulk Erase Configuration Memory

The bulk erase function can be used for the following purposes:

• Erase all configuration and cardholder database (sanitize board, less third party applications)
• Update OEM default parameters after OEM code has been changed
• Recover from database corruption causing LNL-X4420 board to continuously reboot

If clearing the memory does not correct the initialization problem, contact Technical Support.

Bulk Erase Steps 

1. Set SW1400 DIP switches: 1 & 2 "ON" and 3 & 4 "OFF."
2. Apply power to the LNL-M4420 board. LED 1 will flash during boot up.
3. After boot up, LEDs 1 & 2, and 3 & 4 start to alternately flashing at a 0.5 second rate.
   Within 10 seconds, change switch 1 to "OFF."
4. When complete, only LEDs 1 and 4 will flash for about three (3) seconds.
5. The LNL-M4420 reboots and will be available at the default IP address (192.168.0.251).

Communication Wiring

The LNL-M4420 controller communicates to the host via the on-board Ethernet 10Base-T/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, TB1501 for port 1 and TB1500 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, grounded shielded cable, 120 ohm impedance, 24 AWG, 4,000 ft. (1,219 m) maximum for communication.

Reader Wiring

Each reader port supports a reader with TTL (D1/D0, Clock/Data) or 2-wire RS-485 signaling (OSDP reader for example). Power to the readers is selectable: 12 VDC (VIN must be greater than 18 VDC), or power is passed-through (PASS) from the input voltage of the LNL-M4420 (TB300-VIN), 600 mA maximum per reader port. Readers that require different voltage or have high current requirements must be powered separately. Refer to the reader manufacturer’s 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.

REX input should use grounded shielded cable.

To fully utilize each reader port:

• TTL signaling requires a 6-conductor cable (18 AWG)
• RS-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)

Reader Power Select (J503)

Reader Wiring Diagrams

Input Circuit Wiring

There are eight (8) 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 1k ohm, 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.

The input circuit wiring configurations shown are supported but may not be typical.

Relay Circuit Wiring

Four (4) 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 magnetic 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 plus affect the operation of the LNL-M4420. 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.

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.

Memory and Real Time Clock Backup Battery

The real time clock is backed up by a super capacitor or optional lithium battery when input power is interrupted. All other data is stored in non-volatile flash memory.

The super capacitor is selected by default (J1002 jumper link 1 and 2).

To change to battery back up, install jumper link 2 and 3 and install the lithium coin cell.

Battery type: Panasonic BR2032 or CR2032.

IT Security 

When installing the LNL-M4420, it is important to ensure that it is done in a secure manner. Create user accounts to the web configuration page using secure passwords.

Ensure all DIP switches are in the OFF position for the normal operating mode.

The LNL-M4420 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 (admin) and password (password) will be available for five minutes
once the DIP switch is toggled. Therefore, it is important that at least one user account is defined, and the DIP switches are set to OFF before the LNL-M4420 is commissioned. It is also highly recommended not to configure the
LNL-M4420 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 be enabled over the host communication port.

Status LEDs

Power-up

NIC LED blinks and all other LEDs are off.

Initialization

The initialization process has several stages, each stage is represented by a different LED pattern in the following sequence:

• LED 1 is on for about 10 seconds.
• LED 2 is on for 25 seconds.
• LED 3 flashes slowly for 15 seconds.
• LED 3 flashes quickly for 1 second. LED 3 may continue flashing for an additional 60 seconds if the controller firmware is being updated.
• LED 1, LED 2, and LED 3 are off as the application starts.
• LED 4 is then on for 15 seconds indicating a successful 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 Bulk Erase Steps.

Running

After initialization is complete, the LEDs have the following meanings:

* 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.

Specifications

The LNL-M4420 is for use in low voltage, Class 2 circuits only. All output circuits are Class2/Power Limited.

The installation of this device must comply with all local fire and electrical codes.

• Primary Power: 12 to 24 VDC ± 10%, 550 mA maximum (reader and USB ports not included)
• Reader Ports: 600 mA maximum (add 600 mA to primary power current)
• Micro USB Port: 5 VDC, 500 mA maximum (add 270 mA to primary power current)
• Memory and Clock Backup Battery: Super capacitor
  or optional 3 Volt Lithium, type Panasonic BR2032 or CR2032
• 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/1k ohm, 1%, ¼ watt

  Two unsupervised dedicated for cabinet tamper and UPS fault monitoring

• Outputs: Four relays, Form-C with dry contacts
  Normally open contact (NO) contact: 5 A @ 30 VDC resistive
  Normally closed contact (NC) contact: 3 A @ 30 VDC resistive
• Reader Interface:
  • Power: (jumper selectable) 18 AWG (when using local 12 VDC power supply)
    12 VDC ± 10% regulated, 600 mA maximum each reader port (input voltage (VIN) must be greater than 17 VDC) or
    12 to 24 VDC ± 10% (input voltage (VIN) passed through), 600 mA maximum per reader port
  • Data Inputs: TTL compatible 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 VDC open circuit maximum, 40 mA sink maximum
• Cable Requirements:
  • Power: 1 twisted pair, 18 AWG (when using local 12 VDC power supply)
  • Ethernet: CAT-5, minimum
  • Reader data (TTL): 6-conductor, 18 AWG, 500 feet (150 m) maximum
  • Reader data (RS-485 OSDP): 1 twisted pair, shielded, 120 ohm impedance, 24 AWG, 2,000 ft. (610 m) maximum
  • Bus data (RS-485 Bus): 1 twisted pair, shielded, 120 ohm impedance, 24 AWG, 2,000 ft. (610 m) maximum
  • Alarm Input: 1 twisted pair, 30 ohm maximum, typically 22 AWG @ 1000 ft. (304.8 m)
    Output As required for the load
• Environmental:
  • Temperature: 
    Storage: -55 to +85 °C (-67° to 185° F)
    Operating: 0 to +70 °C (32° to 158° F)
  • Humidity: 5 to 95% RHNC
• Mechanical:
  • Dimensions: 8 in. (203.2 mm) W x 6 in. (152.4 mm) L x 1 in. (25 mm) H
  • Weight: 10.65 oz. (302 g) nominal, board only

These specifications are subject to change without notice.

Regulatory Information

FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Liability

It is expressly understood and agreed that the interface should only be used to control exits from areas where an alternative method for exit is available. This product is not intended for, nor is rated for operation in life-critical control applications. LenelS2 is not liable under any circumstances for loss or damage caused by or partially caused by the misapplication or malfunction of the product. LenelS2’s liability does not extend beyond the purchase price of the product.

Certifications

For certification information, refer to the hardware documentation for the host application.

Product Warnings and Disclaimers

THESE PRODUCTS ARE INTENDED FOR SALE TO, AND INSTALLATION BY, AN EXPERIENCED SECURITY PROFESSIONAL. LENELS2 CANNOT PROVIDE ANY ASSURANCE THAT ANY PERSON OR ENTITY BUYING ITS PRODUCTS, INCLUDING ANY “AUTHORIZED DEALER”, IS PROPERLY TRAINED OR EXPERIENCED TO CORRECTLY INSTALL SECURITY RELATED PRODUCTS. FOR MORE INFORMATION ON PRODUCT WARNINGS AND DISCLAIMERS, SEE THE "LENELS2 PRODUCT WARNINGS AND DISCLAIMERS" KNOWLEDGE BASE ARTICLE IN THE LENELS2 KNOWLEDGE BASE. THIS INFORMATION IS SUBJECT TO CHANGE WITHOUT NOTICE.