1. Description
Trusted High Integrity Power Supply System
6
Issue 11
Rockwell Automation Publication PD_T8200
•
dc output fail
- Active high status output indicates the dc output voltage has gone
out of regulation. The dc output fail threshold is 13.75
Vdc
(
±
0.25
Vdc
) for the 15 volt
module, and 21.75
Vdc
(
±
0.25
Vdc
) for the 24 volt module.
•
Output current limiting
- Internal signal limits output current in excessive current
demand situations.
•
POWER FAIL
- Active high status signal that indicates impending loss of output power
due to one of the following:
o
Both inputs have indicated power failure.
o
Remote off control signal activated.
o
Thermal shutdown.
o
Output over-voltage.
•
RESET
- Active high status signal that is generated a minimum of 10 ms (ac input
module) or 0.5 ms (dc input module) after a POWER FAIL signal. RESET remains
asserted for 200 ms (minimum) after module power-up.
•
PFC off
- Active low input that turns off the power factor correction of an individual
input. This signal provides the capability to test the input circuitry of a module by
turning off each input independently while monitoring the module fail signal.
•
Remote off
- Active low input that turns off the output power of a module.
Note
: Bulk Power Fail, PFC Off and Remote Off are accessed through the Monitor Module Connector on the
chassis backplane. The Monitor Module Connector allows for a future development of a monitor card that
would provide remote control and enhanced monitoring of the Power Supply Chassis.
Active low signals are not maintained while RESET is active. All status signals are open
collector and require external pull-up resistors.
RESET is used in the Regent I/O Transceivers for power system interlocking within the I/O
system. A power failure (either input power or module fault) activates RESET and turns off
the dc output Front Panel Indicator.
The POWER FAIL and RESET signals are required for proper operation of Regent I/O
Transceivers and I/O modules during power-up, power down, and loss of power. Refer to
Assembly Installation
in the associated Regent Product Description for details of connecting
these signals to a Regent I/O Chassis.
