Instruction manual

Designing and Planning an M2150 System
28 Access Control Design Guide
Table 2-3: 12Vdc Current Available for Readers, ENVS, Door Releases and Auxiliary Outputs
12Vdc Available Current (mA)
Device 6.5A PSU
2
3.5A PSU
(RAK3)
3.0A PSU
2
2.0A PSU
1
(ENC
-
1L)
8DBC
5090
2590
1590
1090
4DBC 5090 2590 1590 1080
2DBC 5350 2850 1850 1350
8DC
5410
2910
1910
-
4DC
5380
2880
1880
1380
4DCN 5320 2820 1820 1320
2DC 5670 3170 2170 1670
AC24/4 Alarms controller
(24IN
-
4OUT)
5805
3305
2305
1805
OC4/24 Alarms controller (4IN
-
24OUT)
5445
2945
1945
1445
Elevator node - - 450 -
1
The available current for the 2.0A PSU is for readers and auxiliary outputs. The 24Vdc output is used for release devices. A
separate output is provided for battery recharge.
2
500mA reserved for battery recharge.
If additional power is required, door releases or auxiliary outputs will require a separate external power
supply. For sites that require UL compliance, all additional power supplies used must be power limited, UL
Listed for Access Control Systems and Accessories.
AC Monitor
All database units, door controllers and alarms controllers have an AC monitor input, which enables the
system to generate an alarm or event if power fails.
Information for Expert Planners
This section explains how the figures in Table 2-3 have been calculated, which is useful if you want to re-
calculate the available current for door releases or auxiliary outputs if, for example, the unit does not
contain a NIC4 module or a backup battery. The values have been calculated from the data shown in Table
2-4. For example, for a cabinet fitted with an 8DBC, the current available for readers, ENVS, door releases
and auxiliary outputs is as follows.
8DBC 120mA
2 x NIC4 Module 300mA
8 door bypass relays 160mA
8 door release relays 160mA
I/O Module 10mA
8 auxiliary output relays on 4IN-8OUT I/O Module 160mA
TOTAL CURRENT TAKEN 910mA
Power Supply Board max 12Vdc output (excluding battery) 6000mA
AVAILABLE CURRENT (using 6.5A power supply) 5090mA
Remove any items that are not used, and re-calculate the available current.