Installation
51GA02411_002_C0 - 10/2016 - © Leybold
3.7 Connecting the SP-Guard
Only such power supply units may be connected which comply with the
requirements of protective extra low voltage with safe isolation in ac cord-
ance with IEC 60364-4-41 (DIN VDE 0100-410) (PELV/SELV).
To connect the SP-Guard, the supplied connection cable must be used. The
connectors must be properly locked.
The power supply unit is connected as depicted in fig. 3.7.
The SP-Guard has an internal 0.6 amp fuse. This fuse must only be replaced
by Leybold personnel.
No leakage currents must be allowed to flow via the SP-Guard and the sen-
sors. Leakage currents will be present especially in the vicinity of strong
sources of electromagnetic interference like frequency converters, for exam-
ple. To reduce leakage currents, an EMC compliant ground connection (cop-
per strap, for example) must be provided between the M8 tapped blind hole
at the pump and the ground rail of the plant or source of interference.
The limit of 10 V/m laid down in the pertinent standards for industrial systems
must not be exceeded in the case of field-related interference.
Pin Assignment Table for the Connection Cable
LIYCY 16 x AWG 26, black
1: white 24 V
2: brown Housing
3: -- Not connected
4: green 0 V
5: yellow Run to unused terminal
6: grey Electronics GND
7: pink Run to unused terminal
8: red Run to unused terminal
9: blue Run to unused terminal
10: black Run to unused terminal
11: violet 0 V (GND for PLC controller)
12: grey/pink Switching output S1 (warning)
13: red/blue Switching output S2 (error)
14: white/green Switching output S3 (watchdog)
15: brown/green Switching output S4 (pump on)
16: yellow/brown 0 V (GND for PLC controller)
17: -- Not connected
Shield For connection, see fig. 3.7
CAUTION
Fig. 3.6 Ground connection example
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