31
STAND-BY
STAND-BY input (23)
(for external emergency switch-off)
Pin assignment: Pin Signal
1 not used
2 5 V / DC
3 0 V
Activate the stand-by input:
• Under menu item Sb, set the parameter to 1 (see page 23).
• 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 circulation
pump and heater is effected, and the unit enters the operating state
"OFF".
• As long as the contact is open, a flashing „E“ is preceding the message
„OFF“ on the MULTI-DISPLAY (LED).
If the contact is closed, the circulator may be started by pressing the
start key .
Use shielded cables only.
ALARM
Alarm output (24)
(for external alarm signal)
This potential-free change-over contact is activated in case of an alarm
when pins 2 and 3 are connected.
Switching capacity max. 30 W / 40 VA
Switching voltage max. 125 V∼/−
Switching current max. 1 A
Use shielded cables only.
Control connector (26)
To be used as return flow safety device with solenoid valves (see page
11) and/or for supplementary pumps.
Line voltage: 230 V∼ / max. 1.25 A
115 V∼ / max. 2.5 A
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