Instruction manual

Introduction to Symmetry and M2150
2 Access Control Design Guide
LAN/WAN
Database
Unit
(e.g. 4DBC)
Up to 32
database units
in chain
Door furniture
(door release,
bypass and
door monitor)
Auxiliary Outputs
Monitor Points
Monitor Points
Wired or
wireless
comms
Standalone or networked
PCs running the Security
Management System
Software (used for system
setup and monitoring).
Edge Network Video
Server (ENVS)
Up to 16 readers per
database unit
Door
Controller
(e.g. 2DC)
Database
Unit
(e.g. DBU)
Alarms
Controller
(e.g. AC24/4)
Door
Controller
(e.g. 2DC)
Figure 1-1: Example M2150 System
All M2150 access control systems contain at least one database unit, which contains the access control
rules set up at a PC running the SMS software (version 6.1 SP2 or later). SMS PCs can communicate with
database units over a network, modem or serial RS232 connection.
Since each database unit stores the access control rules applicable to the readers and other devices it
manages, this distributes and localizes processing tasks, enhances system performance and enables the
system to operate without the need for a permanent link to an SMS PC.
There are four types of M2150 database unit: the 2DBC, 4DBC, 8DBC and DBU. The 2DBC, 4DBC and
8DBC have built-in door controllers that allow direct connection of two, four and eight readers respectively,
and associated door furniture. The number of readers managed by a single database unit can be increased
to a maximum of 16 by connecting additional door controllers.