PNOZ po3.3p
Operating Manual PNOZ po3.3p
20678-EN-07
9
Block diagram/terminal configuration
PN
O
Z
p
o
w
e
r-B
u
s
PN
O
Z
p
o
w
e
r-B
u
s
L1
1
L2
3
L3
5
2
T1
4
T2
6
T3
Y39 Y40
Start/
Stop
*Safe separation from non-marked area in accordance with EN 60947-1, 6 kV, basic insula-
tion between all safety contacts.
Function Description
The safety contacts are controlled by the base unit. The base unit controls the status of the
input circuits and the feedback loop. The supply voltage is fed via the PNOZpower bus.
When supply voltage is applied the "POWER" LED will light. The unit is ready for operation
when the external start/stop input Y39-Y40 has been closed and the feedback loop and
start circuit have been closed
}
Functional procedure after closing the input circuit of the base unit:
– The safety contacts 1(L1)-2(T1), 3(L2)-4(T2) and 5(L3)-6(T3) will close.
– The LEDs "CH. 1" and "CH. 2" are lit.
}
Functional procedure after opening the input circuit of the base unit:
– The safety contacts 1(L1)-2(T1), 3(L2)-4(T2) and 5(L3)-6(T3) are opened redund-
antly.
– The LEDs "CH. 1" and "CH. 2" go out.
}
Functional procedure after the external start/stop input Y39-Y40 has been opened.
– The safety contacts 1(L1)-2(T1), 3(L2)-4(T2) and 5(L3)-6(T3) are opened non-
safety-related (single channel).
– The LEDs "CH. 2" will go out.
NOTICE
When controlling an expansion module via the den PNOZpower bus the
switch-on delay/delay-on de-energisation of the controlling device (e.g base
unit, control module, ...) and the expansion module are added together.