Rockwell Automation 57C332 AutoMax Power Supply Module and Racks - Manual (Page 12)

2Ć4
2.1.1 Power Supply Module LED Indicators
The Power Supply module faceplate contains 2 LEDs. The green LED
labeled POWER" is lit to indicate when incoming AC power is within
the specified ranges. The red LED labeled FAULT" is normally off.
When it is on, it indicates the output voltages are not all above the
low voltage alarm thresholds or the watchdog OK signal is high.
2.1.2 Power Supply Module Terminal Block
The terminal block on the Power Supply faceplate provides the
means to connect the 115 VAC power and a ground wire from the
rack to the module. Note that terminals 1-5 (reading top to bottom)
are not functional.
The green ground wire from the Rack connects to the GND"
terminal on the faceplate of the Power Supply. Terminal L2" is the
connection for the AC neutral input line from the Rack. Terminal L1"
is the connection for the AC hot input line from the Rack. See section
3.2 for more information.
2.1.3 Power Supply Module Battery Connection
(M/N 57C493 only)
The faceplate connection labeled BATTERY BACK UP" provides the
means to connect the Battery BackĆUp (M/NĂ57C492) to the Power
Supply module. Note that the Battery BackĆUp unit is required only
when there is a DCS5000 Processor module (M/NĂ57C407) or a
Common Memory module (M/NĂ57C413 or 57C413A only) in the
Rack. The Battery BackĆUp unit can save the contents of the
Common Memory and DCS5000 Processor RAM in the event of a
power failure.
The keyswitch is used to reset the OK" signal on the Battery
BackĆUp. It is necessary to reset this signal if the battery fails or if the
cable is removed. See 2.1.4 and 2.2 for more information.
Note that the M/N 57C494 Power Supply module does not contain a
Battery BackĆup connection. Therefore, the above mentioned
Processor and Common Memory modules cannot be used with the
M/N 57C494 Power Supply.
2.1.4 Power Supply Module Keyswitch
The keyswitch on the faceplate routes TTL signals through the
Multibus backplane to the Processor module(s) to allow lockout of
programming functions for system security. The three positions of the
keyswitch are PROGRAM, MEMORY PROTECT, and SET UP. The
position of the keyswitch indicates the security level of the rack, i.e.,
the kind of ONĆLINE Menu operations that can be performed through
a personal computer communicating with the processors in the rack.
The MEMORY PROTECT position allows only monitoring of variables
and saving of tasks from the rack. SETUP allows the operator to
monitor all variables, modify tunable variables, and save tasks from
the rack. The PROGRAM position allows the operator to perform all
ONĆLINE Menu functions, providing the password for the rack is also
entered. See the appropriate Programming Executive instruction
manual for more information.