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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
Watchdog Time-Relay
Watchdog Time-Relay Type WD100V
emergency-stop circuit of the machine.
Application:
Monitoring of controls/IPC in packing machines.
Monitoring of application software
In the control technology of today,
the number of industrial PCs
(IPC) partly with decentralized
intelligence constantly increases.
Individual processes are control-
led independent of each other. In
case of failure or malfunction of
one component, it can therefore
be necessary to switch o the
hardware of a complete machine
or plant.
Time-Relay WD100V is used
to make sure that because of
malfunctions in the program
ow, caused by short-term volt-
age interruptions for instance,
no undened status are created.
The output signal can be evalu-
ated by a superordinate control
or directly switched into the
The software of the mmonitored
control (PLC, IPC) makes a clock
signal at the output Q5 (DC24V,
transistor). The relay of the
WD100V picks up only when the
input recognizes a clock signal.
The time between two slopes has
to be shorter than the time set at
the WD100V (time x scale). When
the clock is missing completely or
at a missing slope, the output relay
of the WD100V opens contacts
11-14 and the motor is switched
o respectively switching on is
inhibited.When the square signals
recovers and the reset-input is
closed or supply-voltage is swit-
Rated supply voltageU
s
Contact elements
Contact type
Measuring input clock
Pulse lenth
Input Reset
Rated ambient temp. range
Dimensions h x w x d
Weight
Attachment
Protection housing / terminals
Technical Data
AC/DC 24-240 V, 0/50/60 Hz, <2W, < 3 VA
DC 20,4-297 V, AC 20-264 V
1 change-over contact (co)
Type 3 see "General technical Informations"
app. DC 5/24 V square wave
Relay picked up when square wave voltage is fed
Relay is released 1-10.000 ms after last slope
0,5 ... 10.000 ms
Button for Reset / bridge = autoreset
-32°C...+70°C
Design V2: 90 x 35 x 58 [mm]
approx. 100 g
on 35 mm DIN-rail or with screws M4.
IP 30/ IP 20
2018-04-24
Q1 = relay output PLC Q5 = clock from PLC
Example for application: Release motor
ched on, the relay picks up again (not earlier than 500
ms after switching o).
WD100V
Part number: Z224319
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