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64 ATS Designers Guide
implementation of all the basic access control functions without requiring additional
expansions
The access control DGP– ATS1250/60 – stores a local copy of the user database and
other settings pertaining to access control. This causes the reaction to the user
presenting the card to be instantaneous even with a high number of users. The
ATS1831/32 IUM modules used with 17k and 67k users support not only the card
learning functions but also the quick searching of the database. This causes the system
to respond within less than 0.5s.
Table 4-9 basic parameters of the ATS1250 access control DGP.
Parameter Value
Number of doors 4
Number of interfaces on
board
4 – door entry readers 1 - 4 (local)
Number of readers 16 max.
Local bus RS485 – the same as system bus
Power supply 4.5A
Batteries 50Ah max.
Lock outputs 2A@30V AC relay
Housing ATS1642 – L
Offline mode YES – full functionality
Zones on board
16 (by default assigned to: 4 door zones, 4 exit buttons,
4 DOTL zones, 4 reader blocking zones)
Memory ATS1830 – interchangeable with IUM ATS1831/32
Card series 40
Database Local
Antipassback Local
The antipassback function requires passage control on both sides that require
readers/keypads on both sides of the door. The access control DGP has a RS485 local
bus interface, which supports connecting of up to 16 identification devices. Those can be
the RAS stations of the ATS system having the RS485 inbuilt and other devices through
the ATS1170 if they are compatible with the Wiegand interface. The device function is
defined by its address on the local bus. The first four addresses double up as the reader
inputs. This is important if the controller is further away from the readers than 70m – see
the bus wiring in section 3.2.1. – that enables them to be installed as local bus
components.
Table 4-10 Reader/RAS station addressing on the local bus.
RAS station local address
Local passage
address
Input Output
Door 1 1, 5 9, 13
Door 2 2, 6 10, 14
Door 3 3, 7 11, 15
Door 4 4, 8 12, 16
Unused passage addresses can be used to install additional manipulators. The RAS
station can be configured to emulate any control panel RAS station, to which the
ATS1250/60 DGP is connected. Such a device will work exactly like the emulated RAS
station, not excluding event log entries. This functionality is especially interesting in cases
when the number of manipulators of the control panel is not sufficient.
The ATS1250 DGP board outputs are, by default, configured for access control functions.
They support exit buttons, DOTL (Door Open Too Long) alarms, door monitoring etc.
Their use must me analysed based on the implemented access control functions. The
table below contains the default zone mappings of the access control functions to local
addresses for the ATS1250 DGP.
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