Instruction manual

Euphonix Modular I/O Configuration Guide Product Data Sheets

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Redundant clock sources

The SY982 Sync module is the central clocking source for the Modular I/O

system. It provides all necessary clocks for proper system operation and can be

synchronized internally or externally. A Modular I/O frame can be equipped with

a second (redundant) SY982. Both sync modules must be installed in the red

“reserved” slots on the rear-plane of the frame.

Use the MASTER/SLAVE DIP to set the first SY982 as MASTER and the second

unit to SLAVE. Both SY982 modules should be locked to the same external sync

source. In this mode, both modules generate all clocks all the time with the

SLAVE disconnected from the frame sync busses. A red LED “SLAVE“ normally

lights indicating the SLAVE module is in “ready” status.

The SLAVE unit permanently watches the correct LOCK status of the MASTER.

In case of failure of the MASTER (losing external sync or fault on the module

hardware) the SLAVE unit takes over and continues clocking the frame. The red

SLAVE-LED blinks in this condition. If the MASTER unit returns to lock (new

sync signal, or new hardware) it automatically takes over the clock busses and

the SLAVE returns to the “ready” status.

Setting the frame ID

Set DEV0, DEV1, & DEV2 to “ON.”

DEV X

On the master sync module, set DEVX to “ON.” On a redundant sync module,

set to “OFF.”

Can Buss Termination

Can Buss Termination must be done on either the SY982 Sync or FC972

Remote. Lack of termination or double termination may result in communication

errors in the system. Typically, CAN Termination is done on the FC972.

SY982 S