Pin Signal name Signal type Meaning
3 KT6_IN I Customer key 6
4 M V Ground
Universal input X55
Connector designation: X55
Connector type: Male connector, 4-pin
Pin Signal name Signal type Meaning
1 KT7_IN I Customer key 7
2 KT8_IN I Customer key 8
3 KT9_IN I Customer key 9
4 M V Ground
Technical data for digital inputs
Parameter Value
Voltage Nominal: 0 V to 5 V
Permissible: -3 V to 30 V
Typical power consumption +0.2 mA at 5 VDC
-0.3 mA at 0 VDC
Signal level (including ripple) High: 2.3 V to 5 V
Low: 0 to 1.0 V
Electrical isolation None
Note
When connecting an external 24 VDC power supply to interfaces X51, X52 and X55, this must
satisfy the requirements of a protective extra low voltage (PELV) according to UL 61010. A
backup fuse must also be used which safely trips within 120 seconds at an ambient temperature
of 0° C for a current of 6.5 A.
Alternatively, a circuit must be used that limits the current to 5 A within 60 seconds during
normal operation and in the event of an individual error.
The contact gap of the fuse or the individual error-proof circuit must be ensured with 3.0 mm
according to UL 61010 for a primary power supply from OVC III circuits up to 600 VAC (line-to-
neutral voltage).
When using an external power supply, make sure that the fuse used has a tripping rating that
corresponds to the maximum possible short-term short-circuit current of the power supply unit
used.
Connecting
6.1 Pin assignment of the interfaces
Machine Pushbutton Panel: MPP 464 IE H
48 Equipment Manual, 03/2021, A5E50810237B AA
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