Cryo-Compact Circulators
13
Electrical connections:
Computer interface
RS232 / RS485
External sensor
Pt100
Optional
: (Order No. 8900100 Electronic module with analog connections)
Programmer input -100 °C to 400 °C = 0 - 10 V or 0 - 20 mA or 4 - 20 mA
Input for the signal of a flow meter or external manipulated variable
Temperature recorder outputs
0 - 10 V (0 V = -100 °C, 10 V = 400 °C)
0 - 20 mA (0 mA = -100 °C, 20 mA = 400 °C)
4 - 20 mA (4 mA = -100 °C, 20 mA = 400 °C)
Standby input
for external emergency switch-off
Alarm output
for external alarm signal
Warning functions and safety installations
Excess temperature protection
adjustable from 0 °C ... 220 °C
Low liquid level protection
float switch
Early warning system for low level
float switch
Classification according to DIN 12876-1
class III
Alarm message
o audible (permanent)
Warning message
o audible (in intervals)
Overload protection
for compressor and pump motor
High temperature warning function
o audible (in intervals)
Low temperature warning function
o audible (in intervals)
Supervision of working sensor
plausibility control
Reciprocal sensor monitoring between
working and safety sensors
difference >35 K
Environmental conditions according to IEC 61 010-1:
Use indoors only.
Altitude up to 2000 m - normal zero.
Ambient temperature: see Technical specifications
Humidity:
Max. relative humidity 80% for temperatures up to +31 °C,
linear decrease down to 50% relative humidity at a temperature of +40 °C
Max. mains voltage fluctuations of ±10% are permissible.
Protection class according to IEC 60 529
IP21
The unit corresponds to Class I
Overvoltage category
II
Pollution degree
2
Caution:
The unit is not suitable for use in explosive atmosphere
EMC requirements according to EN 61326-1
The device is an ISM device of group 1 per CISPR 11 (uses HF for internal purposes) and is
classified in class A (industrial and commercial sector).
Note!
•
Devices of class A are intended for the use in an industrial electromagnetic
environment.
•
When operating in other electromagnetic environments, their
electromagnetic compatibility may be impacted.