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LNL-2220 Intelligent Dual Reader Controller
Connection
TB11
Out 3
Door 2 strike
Out 4
Door 2 Aux
29.2
Communication Wiring
The controller communicates to the host via the onboard 10-BaseT/100Base-TX Ethernet interface (port 0)
or RS-232 interface (port 1). The RS-232 interface is for direct one to one connection to a host computer
port or via modem, 50 feet maximum.
There are a few options for establishing communication to configure the settings for the first time. For initial
configuration prior establishing a LAN connection, a CAT 5 crossover cable can be used to connect directly
to a PC. In this scenario, the controller has a static IP address and the web browser-enabled PC is connected
directly to the controller using a crossover cable.
The downstream communication port (TB3) is a 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 4000 feet
(1200 m). Use twisted pairs (minimum 24 AWG) with an overall shield for communication.
Important:
TB2
TXD
RXD
RTS
CTS
GND
Port 1, RS-232 To Host
(Wire with 24 AWG stranded)
150 —
revision 7
NO: Normally open contact
C: Common
NC: Normally closed contact
NO: Normally open contact
C: Common
NC: Normally closed contact
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!
Communication wiring
TB3
TR+
TR-
GND
To Downstream Devices
(Wire with 24 AWG,
stranded twisted pair(s) with
an overall shield)
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