Specifications

Modular I/O Configuration Guide34
Cooling
Install the IO94 with at least 1 RU of space above and below the frame. There should be unrestricted airflow on the sides and over
PSU heatsinks.
Master Sync Module
Make sure to install a master sync module in one of the four red reserved slots (left side of frame) before applying AC power. This
is typically an SY983 Sync module but the following other modules may also be used as a master sync module when set to Master
mode: MM935 MADI, MM936 MADI, DD915 8ch AES I/O, DD916 8ch AES I/O, and HD944 16ch De-embedder.
Place only one master sync module source in the frame except when using two SY983 Sync modules in redundant sync mode.
In this case, configure the SY983s for redundant sync operation and fit both modules into the frame’s red reserved slots. See
“SY983 Sync HD” on page 41.
The four red reserved slots may also be used for other modules.
Control Bus
Each frame must be fitted with an FC972 Remote to externally configure all modules (except analog line in/out and WC984) and
control mic preamps remotely using a web browser. Install only one FC972 per frame and up to two SY983s (for redundant op-
eration, differentiated by Master/Slave setting).
A Module's system ID consists of the Frame ID + module CAN ID. The Frame ID is determined by the FC972’s IP Address/Sub-
net/Host Address. The FC972 must be assigned a unique IP Address based on the frame’s role within the system. A CAN ID must
be set for each externally controllable module. Most modules have 32 CAN ID settings available but the AD914 Remote Mic Pre-
amp has 16.
The FC972 and SY983 have default module CAN IDs that do not interfere with those of other modules. The internal CAN bus
must be terminated once per frame, either on the FC972 or SY983.
Using the CAN Address switches on the FC972 or SY983 is an older method of setting the Frame ID. An explicit CAN Address must
be set only when employing a hardware CAN-BUS remote controller to configure frames. In System 5, the Frame ID is set using
the FC972's IP Address for configuration using a web browser interface.
To avoid damaging analog circuits, install a master sync source module in a red reserved slot before applying AC power.
IO94 front (left) and back (right)