PISA11.CLASS2
PISA11-Series
P
ROTECTION
M
ODULE
24V,
4
O
UTPUTS
11.
F
UNCTIONAL
D
IAGRAM
Fig. 11-1
Functional diagram
Output
Current
Monitor
+ Output 1
Reset,
ON/OFF
Safeguard
for Minimum
Input Voltage
-
-
+
Failure
+ Output 2
Failure
+ Output 3
Failure
+ Output 4
Failure
I
Sense
I
Sense
I
Sense
I
Sense
Current
Limiter &
Shut-down
Manager
Input
Status
12
11
13
14
Outputs-
OK
Contact
Input
Reset,
ON/OFF
Reset,
ON/OFF
(+)
(-)
Output
OK
Synchro-
nization
15
16
Sync.
I
Sense
Redundant
Emergency
Switch
NEC-CLASS-2
Controller
12.
B
ACK
-
FEEDING
L
OADS
Loads such as decelerating motors and inductors can feed voltage back to the PISA11 protection module. This feature
is also called return voltage immunity or resistance against Back- E.M.F. (Electro Magnetic Force).
The protection module is resistant and does not show malfunctioning when a load feeds back voltage up to 30Vdc to
the protection module. It does not matter whether the protection module is on or off.
The protection module has no capability to absorb energy. Internal diodes (integrated body diodes of the Mosfets)
directs the voltage and energy to the power supply, which is connected on the input side of the protection module.
The power supply defines the amount of energy which can be absorbed.
Feb. 2012 / Rev. 1.3 DS-PISA11.CLASS2 - data sheet -
All parameters are specified at 24Vdc input, 25°C ambient temperature and a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278-0 Germany
10/19
