JULABO HT30-M1 High Temperature Circulator - Manual (Page 59)

HT30-M1
59
STAND-BY
STAND-BY input (32)
(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 40).
• Connect an external contact 'AK' (e.g. for emergency switch-off) or an
alarm contact of the superordinated system.
In case the connection between Pin 2 and Pin 3 is interrupted by opening
the contact 'AK', a complete shutdown of the circulating pump and heater
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 circulator returns to the stand-by status and
„OFF“ is displayed.
Setp. : xx.xx°C
IntAct: xx.xx°C
Prof. : x Stp: x
** STAND-BY **
Additional tips for using the STAND-BY input:
The Stand-by function can be used in conjunction with the AUTOSTART
feature (see page 39)
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, an 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 44 and 46). The
display „STAND-BY“ appears. The setpoint value and the time are both
held at the current value. The temperatur of the bath fluid will be held
constant at this temperature. The programmer continues once the
contact is reclosed.
Warning: this is not an actual shutoff feature
1
2
3
AK
AK
1
2
3
STAND-BY