Bus Formats - Interlogix CDC4 Installation And Programming Manual

Bus formats

There are two local data buses on the CDC4 door controller. Each bus can have
up to 16 RAS devices. Each bus can support readers other than ATS readers.
Each bus supports the following protocols:
•
ATS
•
OSDP (Open Supervised Device Protocol) version 2
•
SALLIS by SALTO Systems
•
Aperio
Each bus can use one protocol at a time, but the two buses can use different
protocols.
The bus format for each bus is defined on the Details tab of the Expander
devices list for CDC4. See the "Bus options" section on page 84. If the bus
format is OSDP, then the baud rate of the bus can be configured, and encryption
can be enabled by entering the OSDP encryption key. OSDP encryption uses the
AES 128-bit encryption algorithm.
When assigning a RAS to CDC4 via the Assigned RAS tab of the Expander form,
specify the bus format that the reader will use (which depends on the RAS
number). See the "Assigned RASs tab" section on page 88.
Non-ATS devices must meet certain requirements to work with CDC4, as
described in the following sections.
OSDP
The CDC4 Door Controller supports OSDP version 2.
Note: OSDP has a fixed baud rate of 9600 baud.
OSDP reader addresses
If the OSDP reader has DIP switches, refer to the manual for the reader to
configure the reader's address using the DIP switches. If the reader does not
have DIP switches, then the reader's address must be configured using a
configuration card. Assign the reader the desired address by badging the
appropriate configuration card at the reader.
OSDP encryption
Without an encryption key configured for the CDC4 bus, the CDC4
communicates with the OSDP devices using a default encryption key as
specified in the OSDP standard. To use a non-default encryption key with OSDP
readers, set the 128-bit AES encryption key for the bus in Downloader. See the
"Bus encryption key" section on page 85. The encryption key will be set on each
OSDP reader attached to the bus once the encryption key is defined.
CDC4 Door Controller Installation and Programming Manual
Chapter 2: System functions
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