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12 3 ak – JULABO SC 2500w Professional Series Recirculating Coolers User Manual

Page 65

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Recirculating Cooler

65

ALARM

Alarm output
(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

Functional description see page 57

1

2

3

AK

STAND-BY

STAND-BY

input

(for external emergency switch-off)

Pin assignment:

Pin

Signal

1

not

connected

2

5 V / DC

3

0 V


Functional description see page 6

1

2

3

4

5

6

REG+E-PROG

Programmer input / temperature recorder output

Pin

Signal

1 Voltage output

Channel 1

0 ... 10 V

2 Voltage output

Channel 2

0 ... 10 V

3 GND for outputs

0 V

4 Programmer input

EPROG

0 to 10 V / 0 to 20 mA

5 Current output

Channel 3

0 to 20 mA / 4 to 20 mA

6 GND for Progammer

0 V

Functional description see page 59



Control connector

Return flow safety device.

If the liquid levels in the recirculating cooler and the external system are
at different heights, overflowing must be prevented after the power has
been turned off. For this reason, solenoid valves for loop circuit can be
integrated in the loop circuit.

The control output is not powered in the OFF condition.
Output voltage: 230 V

 / max. 0.1 A

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