Section IV
Control Interface Details
006-0006715 10/31/18
Rev J
38 of 44
MPS-MPPS-4000 Guide
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Synchronized Operation of Multiple Units: MPS
Interconnecting Multiple Units via the Configuration port using cable SYN‑9322 or SYN‑9323
enables synchronized start-up, shutdown, restart, and fault behavior of connected Units.
Turn-On, Turn-Off, Restart Control:
When an MPS device is in the Standby Mode (input power applied but output not enabled),
and its output is enabled via the front panel switch, remote enable input, or serial command,
all other MPS devices that are also in the Standby Mode will enable their outputs at the same
time. Likewise, when a Unit is operating and its output is running, if its output is disabled via
the front panel switch, remote shutdown input, or serial command, all other MPS devices that
are also operating will disable their outputs at the same time. Finally, when an MPS restarts
after a fault event, it will coordinate its restart to be simultaneous with other MPS devices
restarting during the same interval. These features are enabled by default when the SYN‑9322
or SYN‑9323 cable is utilized to interconnect multiple MPS devices. The features can be disabled
via the serial interface using the SYNCCON OFF command, and this setting is stored in non‑
volatile memory. These features can also be disabled via the web interface.
Fault Synchronization Control:
When an MPS device is operating, and the output shuts down due to a load fault, such as a
short circuit, the Fault Synchronization Control will cause other MPS devices interconnected
via the SYN‑9322 or SYN‑9323 cable to shutdown at the same time. This feature is disabled by
default. It can be enabled via the serial interface by issuing the command, and the setting is
stored in non‑volatile memory. The feature can also be enabled via the web interface.