For machines with a pipe connection, the potential pressure drop inside the machine is given
in the following table:
Table 4-2
Pressure drop in motors with pipe connection
Type
Degree of pro‐
tection
Volume flow
Pressure drop
Flow resistance
1PH818.
IP23
0.21 m
3
/s
450 Pa
10204 Ns
2
/m
8
IP55
0.17 m
3
/s
550 Pa
19030 Ns
2
/m
8
1PH822.
IP23
0.33 m
3
/s
600 Pa
5510 Ns
2
/m
8
IP55
0.31 m
3
/s
650 Pa
6760 Ns
2
/m
8
1PH828.
IP23
0.52 m
3
/s
600 Pa
2220 Ns
2
/m
8
IP55
0.42 m
3
/s
600 Pa
3400 Ns
2
/m
8
4.5
Interlock circuit for the external fan
Interlock circuit for the external fan motor
For machines with external fans, install an interlock circuit that prevents the main machine
being switched on if the external fan is not operational.
Force-ventilated 1PH818. and 1PH822. motors are equipped with electronically commutated
motors (EC motor).
NOTICE
Voltage fluctuations
The electronics of the external fan equipped with EC motor can be damaged as a result of
voltage fluctuations. Supply the external fan with power from the line supply and not via a
frequency converter.
4.6
Interlock circuit for anti-condensation heating (option)
If the anti-condensation heating is operated while the machine is running, this can increase
the temperatures inside the machine.
● Install an interlock circuit that switches off the anti-condensation heating once the main
machine is switched on.
● Only switch on the anti-condensation heating after the machine has been switched off.
See also
Switching on the machine (Page 97)
Preparations for use
4.5 Interlock circuit for the external fan
SIMOTICS M-1PH8 1PH818., 1PH822., 1PH828.
Operating Instructions 10/2017
33
Summary of Contents for SIMOTICS M-1PH818
Page 2: ...20 10 2017 15 09 V20 00 ...
Page 14: ...Introduction SIMOTICS M 1PH8 1PH818 1PH822 1PH828 14 Operating Instructions 10 2017 ...
Page 28: ...Description SIMOTICS M 1PH8 1PH818 1PH822 1PH828 28 Operating Instructions 10 2017 ...
Page 104: ...Operation 8 10 Faults SIMOTICS M 1PH8 1PH818 1PH822 1PH828 104 Operating Instructions 10 2017 ...
Page 166: ...Quality documents SIMOTICS M 1PH8 1PH818 1PH822 1PH828 166 Operating Instructions 10 2017 ...
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