Instruction manual

Introduction to Symmetry and M2150
4 Access Control Design Guide
Table 1-1: Summary of M2150 Main Boards
Device Picture Purpose
DBU
A database unit that allows autonomous operation of up to 16 readers.
Readers, monitor points and auxiliary outputs connect using separate door
and/or alarms controllers.
The unit can be fitted with an optional NIC-4 or NIC-WI module, which
allows LAN or wireless access from an SMS PC for system configuration,
monitoring and reporting. If required, two NIC-4 modules can be fitted to
provide resilience against network interruptions. An integrated RS232 port
is provided if serial or modem communications with the SMS PC is
preferred.
A one-port RS232 module can be fitted for integration with an optional
serial device such as an ENVS when the integrated RS232 port is already
in use.
An on-board 3.6V battery maintains system configuration in the event of a
power disruption.
A DBU is also used in an elevator node to control access to elevator
floors.
2DBC
This is a combined database unit and door controller. It includes the same
features as a DBU, but has an integrated door controller that allows direct
connection of up to two readers and associated door furniture (release
device, bypass, door monitor and exit request button).
20mA multiNODE Current Loop Protocol (MCLP), Wiegand or RS485
readers can be connected (Wiegand readers require the WIM-2 module;
RS485 readers require the Dual RS485 Reader module).
An optional I/O module can be fitted to enable connection of auxiliary
outputs and monitor points.
Additional readers, monitor points and auxiliary outputs can connect using
separate door and/or alarms controllers. The 2DBC can manage up to 16
readers.
4DBC
This is a combined database unit and door controller for up to four readers
and associated door furniture (release device, bypass, door monitor and
exit request button).
20mA (MCLP), Wiegand or RS485 readers can be connected (Wiegand
readers require the WIM-4 module; RS485 readers require the Quad
RS485 Reader module).
Up to two optional I/O modules can be fitted to enable connection of
auxiliary outputs and monitor points.
Additional readers, monitor points and auxiliary outputs can connect using
separate door and/or alarms controllers. The 4DBC can manage up to 16
readers.