Subracks
2-4
Hardware - SIMADYN D
Edition 04.2011
All of the output voltages are monitored for an undervoltage condition
(e. g. as a result of overload/short-circuit).
Undervoltages at the output
Response
V (5 V)
< 4.7 ... 4.85 V
(for t>100-200 µs)
Red fault LED is lit
The output voltages are shutdown
(CPU stop)
No automatic restart (the line supply
voltage must be disconnected)
V (+ 15 V)
< approx. 14 V
V (- 15 V)
> approx. -14 V
Red fault LED is lit
5V voltage remains
System failure message
The associated module („STOP“ tab) is configured in HWConfig under
„Object properties“ to define how the module behaves when a system failure
message is output (bus signal *RDYIN=low):
Modules can reset their binary and analog outputs
CPU modules can go into the „STOP“ condition („H“)
2.1.3 Battery
back-up
The SR6 subrack does not have its own back-up battery.
A back-up battery can be connected at the screw/plug-in terminal X2 to save
configured values (application software) during a power failure (using
function block SAV). The connection assignment is printed on the front
panel:
Connector X2, Pin Designation
Comment
1
0 V
Battery ground
2
BATAL
Battery monitoring („alarm“ for logical 0)
3 Vcc
+ 3.0 ...4.5 V battery voltage
Current load: Approx. 10 µA depending on the particular CPU module
It is recommended that the battery is changed every year.
When using a Lithium battery, a series resistor of 39
must be provided to
prevent an inadmissibly high charging current when a fault condition
develops (5V of the power supply is applied to the battery via a defective
diode - which could be a potential explosion hazard).
The monitoring CPU module in SR6(V) does not initially identify when there
is no back-up battery or the back-up battery is discharged (no flashing „b“).
Output voltage
System failure
message
Battery connection
External battery
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