46 HYDRA2
Installation Manual
Fixed Format I/O
I/O BOX IDENTIFICATION
Each I/O box on a Hydra2 network
needs to be given a unique ID in the
form of a number between 0 and 255.
The Hydra ID, or “HID” for each box
is set using a DIP switch accessible
from the rear of fixed format I/O
boxes.
Label pockets are fitted to the front panel
of I/O boxes to aid visual identification.
The 8 way DIP switch is set as an 8 bit
binary representation of the HID value
with the left hand switch used for the
most significant bit, and the right hand
switch for the least significant bit. A
switch in the down/off position represents
a binary 0 and a switch set in the up/on
position representing a binary 1. Each
individual switch / binary bit equates to a
decimal value, starting at 1 for the least
significant bit. The remaining switches are
double the value of their less significant
neighbor, making the 8th / most
significant bit equate to a decimal value of
128. The overall decimal value is the sum
of the decimal values of each binary ‘1’
All fixed format I/O box ID switches are
orientated the same way, though some
boxes, such as MADI units, use a different
style switch with more pronounced
labelling. Ignore any labels on the switch
itself and always refer to the Calrec
labelling on the surrounding panel, which
will show the most significant bit switch on
the left and the binary 1 position as up.
Care should be taken when setting HIDs
to avoid accidentally duplicating the same
ID on more than one box. Duplicate box
IDs can cause network conflicts. I/O
boxes should be disconnected from the
network before changing their HIDs, and
reset or power cycled once the DIP switch
is set to ensure the new HID is active
before reconnecting to the network.
If replacing an I/O box for any reason,
choosing a box of the same type as the
original and setting it with the same ID
makes it a drop-in replacement that will
work with existing user memories and
settings, requiring no further configuration.
When connecting additional I/O boxes to
a network it is important to be aware of
the existing I/O HIDs in order to select
a unique number and avoid creating a
conflict.
Address2
Some I/O boxes, such as MADI units,
are fitted with 2 banks of DIP switches
- Address 1 and Address 2, to provide a
16 bit ID and therefore a greater range
of values. Please note that only ID
values between 0 and 255 are currently
supported. Any DIP switches labelled
Address 2 should all be set to the off
position.
1
1 0
2
3
4
5
6
7
ADDRESS
0
1
0
0
0
1
0
0
1
1
1
128 64 32 16 8
4
2
1
32
4
2
1 =
+
+
+
39
STANDARD SWITCH FOR HID SETTING
• The above diagram shows how
each switch relates to a decimal
value. The setting shown in the
example provides a decimal
HID value of 39
Содержание Hydra2
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