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28
Overview of the LNL-2220
This installation guide is intended for use by technicians who will be installing and maintaining the
LNL-2220 Intelligent Dual Reader Controller (IDRC).
The IDRC provides a single board solution to control two doors, or a single door in paired mode. It holds the
database for the hardware configuration, and card holder database in nonvolatile memory. The event log
buffer is stored in battery backed memory.
Each reader port can accommodate a readhead that utilizes wiegand, magnetic stripe, or 2-wire RS-485
electrical signaling standards, one or two wire LED controls, and buzzer control (one wire LED mode only).
Four form-c relay outputs may be used for strike control or alarm signaling. The relay contacts are rated at
5A @ 30 VDC, dry contact configuration. Eight supervised inputs are provided for monitoring the door
contacts, exit push buttons and alarm contacts. Inputs can be configured to meet Grade A Supervision
requirements. The LNL-2220 requires 12-24 VDC for power. It is recommended that the board be mounted
0.25 inch minimum above any conductive surface.
28.1
Interfaces
The IDRC interfaces upstream with the access control software on a host system.
Configuration data and event/status reports are exchanged with the host via port 0, 10BaseT/100BaseTX
Ethernet interface or port 1, RS-232 interface. Additional I/O devices are communicated to via the
downstream communication port, 2-wire RS-485. It supports 32 downstream devices.
The LNL-2220 has an on-board reader interface device capable of supporting up to two readers. A Bioscrypt
reader can be connected directly to the LNL-2220 (this does not count as one of the 32 downstream devices).
Hardware Installation Guide
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revision 7 —
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