43
AK
1
2
3
STAND-BY
AK
1
2
3
STAND-BY input (33) (for external emergency switch-off)
Pin assignment:
Pin
Signal
1
not
connected
2
5 V / DC
3
0
V
Use shielded cables only.
Activate the stand-by input:
•
Under menu item Stand-by, set the parameter to „yes“
(see page 27).
•
Connect an external contact 'AK' (e.g. for emergency
switch-off) or an alarm contact of the superordinated
system.
•
If the connection between Pin 2 and Pin 3 is interrupted by
opening the contact 'AK', a complete shutdown of the
heating device is effected, and the unit enters the condition
"OFF".
As long as the contact remains open, line 4 of the DIALOG-
DISPLAY (LCD) flashes and displays the message
„STAND-BY“.
If the contact is reclosed, the programmable controller returns
to standby mode and “OFF” is displayed.
Additional tips for using the stand-by command:
The stand-by function can be used in conjunction with the
autostart feature (see page 27).
1. If the autostart function is not turned on, the stand-by input
should be used as described above.
2. If the autostart funcion is enabled, the instrument will revert
back to the original method of entering the setpoint (i.e.
keypad, RS232, analog input, etc.).
•
Entering the setpoint with the keypad, for example
. As
described above, a bipolar shut-down is accompanied by
the “STAND-BY” display and the OFF status. The
programmable controller starts again when the contact is
reclosed. The temperature of the bath liquid changed during
the STAND-BY status.
•
Entering the setpoint with the programmer (see pages 29
and 31). The display STAND-BY appears. The setpoint
value and the time are both held at the current value. The
temperature of the bath fluid will be held constant at this
temperature. The programmer continues once the contact
is reclosed.
CAUTION:
This is not an actual emergency shut-off!
