Specifications

B&K Components Device Interface Protocol (BKC-DIP) Specification
Version 2.01.00
Updated 01/24/07
Page 20 of 54
In earlier B&K Components device (Series II products specifically), there were system parameters
to allow Z1 and Z2 power and/or volume controls to be linked.
With the development of the CT 610 (a 6 stereo zone unit, or up to a 12 mono zone unit), the
concept of linking became even more important. In BKC-DIP V2.0x products, such as the CT 610
and CT 310, Logical Zones may be used to link command and control of multiple Hardware
Zones.
Groups allow a means for multiple Hardware Zones to track each other (i.e. if the in volume in one
zone changes, the volume in another zone changes too).
Hardware Zones, A – F, may be linked in up to 18 Groups, a - r. These Groups and their Code
Set/Zone ID assignments determine how many Logical Zones are configured in a system.
NOTE: A Logical Zone is created by assigning a Group a unique Code Set/Zone ID for use
in the control of Hardware Zones. For example, the CT 610’s factory default setting
has 9 logical zones: Z0, Z3, Z4, Z11, Z12, Z13, Z14, Z15, Z16.
An abstract concept such as this requires a concrete example for clarification. The following
example is based upon the factory default Group and Code Set/Zone ID assignments of the
Hardware Zones in the CT 610.
Default CT 610 Example
Using Groups each Hardware Zone of a CT 610 is capable of working with multiple Code
Sets/Zone IDs.
The factory default for each Hardware Zone of the CT 610 is stereo mode. The Group and Code
Set/Zone ID assignments are as follow:
Hardware
Zone
Group
Code Set
(Zone ID)
Group
Code Set
(Zone ID)
Whole House
Code Set
(Zone ID)
A 3 (group a) 11 (group c) 0 (group 0)
B 3 (group a) 12 (group d) 0 (group 0)
C 3 (group a) 13 (group e) 0 (group 0)
D 3 (group a) 14 (group f) 0 (group 0)
E 4 (group b) 15 (group g) 0 (group 0)
F 4 (group b) 16 (group h) 0 (group 0)
Given the above Group and Code Set/Zone ID configuration yields the following 9 Logical Zones
and their associated Hardware Zone members:
Logical
Zone
Hardware Zone members
Z0 A, B, C, D, E, and F
Z3 A, B, C, D
Z4 E and F
Z11 A
Z12 B