Renesas FLASH Development Toolkit 3.07 Instruction Manual download pdf (Page 14)

Access Control Design Guide

2 Chapter 2: Designing and Planning an

M2150 System

About this Chapter

This chapter explains the issues to consider during system design, planning and installation.

Starting a Site Schematic

Design of an M2150 access control system should include a Site Schematic, which is a plan of the building

that indicates all key information that the installation team will require, such as the locations of card readers

and doors, the types and locations of hardware to use, cable routing paths, antipassback zones, etc. When

planning a system, it is recommended that you mark all relevant information on the Site Schematic. You

should begin by marking the positions of all doors to be access controlled.

A checklist is provided on page 59. It is recommended that you print the checklist and mark off each

relevant item as you work through this chapter.

Selecting the Database Units and Controllers

Begin the design of the system by determining the number of readers required, and from that, the number

of database units and door controllers that are needed. Consider whether it is appropriate to incorporate a

degree of contingency to allow additional readers to be added at a later date without major changes to

system hardware.

The range of M2150 database units and door controllers is given in Table 1-1 on page 4. Note, however,

that RS485 readers (page 23) cannot connect to an 8DBC or 8DC, since these devices do not have a port

for an RS485 module. It is normal to use 20mA (MCLP) readers (as described on page 22).

Remember that each database unit can control up to 16 readers by connecting additional door controllers.

You can use this feature to minimize the hardware cost, since it is cheaper to add a door controller than to

use another database unit that has an integrated controller.

You can also minimize hardware cost by choosing combinations that reduce the number of cabinets,

boards and power supplies required. For example, a cost-effective solution for a 16-reader system is an

8DBC and 8DC in a single CAB5 cabinet. The section on page 18 provides details of which combinations

of boards fit in each cabinet, and it is important to refer to this section when you are making your choices.

In some cases, it may be more cost effective to use a larger number of separate cabinets than is strictly

necessary. For example, a 2DBC and three 2DCs, rather than a single 8DBC. The cost saving occurs,

since it allows door controllers to be sited closer to the relevant doors, which can reduce the length of

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Renesas FLASH Development Toolkit 3.07 Instruction Manual Page 14