Overview Of The Lnl-500; Interfaces; The Intelligent System Controller Board - Lenel OnGuard Hardware Installation Manual

8

Overview of the LNL-500

This installation guide is intended for use by technicians who will be installing and maintaining the
Intelligent System Controller (LNL-500).
The ISC provides real time processing for the I/O interfaces to which it is connected. It holds the database
for the subsystem configuration and cardholders, the event log buffer in battery-backed memory.
8.1

Interfaces

The ISC interfaces upstream with the Access Control software on a host system and downstream with the
following field hardware components:
16 Downstream
Devices Total
RS-485
Multi-drop
2 or 4 wire
Single Reader
Interface
Module
Up to 16 Single
0 1
Reader Interface
2 3
4 5
6 7 Modules
8 9
*
#
(16 Readers)
8.2

The Intelligent System Controller Board

The ISC board contains the following components: two (2) unsupervised alarm inputs, one (1) RS-232 or
RS-485 interface, two (2) RS-485 interfaces (which can consist of two 2-wire or one 4-wire interfaces), one
Intelligent System Controller Communications Overview
Access
Control
System
Intelligent System
Controller
Dual Reader
Interface
Module
Up to 16 Dual
Reader Interface
0 1
2 3
0 1
4 5
2 3
Modules
6 7
4 5
8 9
6 7
*
#
8 9
(32 Readers)
*
#
Hardware Installation Guide
Communications
from Host to Controller
RS-232, RS-485, Ethernet
Dial-up, Fiber, etc...
Downstream Communications
• Two 2-wire ports
• One 4-wire port
Input/Output
Control
Module(s)
Up to 8 Output Control Modules
or
Alarm Input Control Modules
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