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cdvigroup.com
CTV900A
2-Door Controller
INSTALLATION MANUAL
ACCESS CONTROL SYSTEM OVERVIEW
For an overview of the access control system using Centaur 4.0 and Up, refer to “Figure 3”. Please take note of
the following items concerning the connection of the controller network to the access control server:
• CENTAUR 4.0 AND UP: Up to 256 controllers can be connected to the access control server to
control a total of 512 readers (expandable to 2048 readers).
• Controllers are connected in “daisy chain” format or can be connected in a “star network” when
using the CAA370P Network Hub. “Y” networks cannot be used when connecting the RS485
communications bus between controllers.
• The controller addresses assigned by the dip switches on each controller do not have to correspond
to the actual order of controller placement along the RS485 network. However, we recommend that
this is done to facilitate troubleshooting and installation service.
• Connect the A1+, B1- and GND of the rst controller to the A1+, B1- and GND of the second
controller using Belden 1227A type cable. Repeat from the second controller to the third and so
forth to a maximum of 1220m (4000 ft.).
• Depending on the location of a controller it may be required to place the Controller Network EOL
jumper on. For more information refer to “EOL (Controller Network)”.
• To change the communication speed:
- stop communications in the CENTAUR software
- change the baud rate in the software
- change the dip switch settings on all controllers
- press the reset button on each board
- if using the CAA360USBCAB Converter, change the baud rate jumper (J5) to on
- start communications
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