Siemens MPP 464 IE H Equipment Manual page 48

Connecting
6.1 Pin assignment of the interfaces
Universal input X55
Connector designation:
Connector type:
Technical data for digital inputs
Parameter
Voltage
Typical power consumption
Signal level (including ripple)
Electrical isolation
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.
48
Pin Signal name
3 KT6_IN
4 M
X55
Male connector, 4-pin
Pin Signal name
1 KT7_IN
2 KT8_IN
3 KT9_IN
4 M
Signal type
I Customer key 6
V Ground
Signal type
I Customer key 7
I Customer key 8
I Customer key 9
V Ground
Value
Nominal: 0 V to 5 V
Permissible: -3 V to 30 V
+0.2 mA at 5 VDC
-0.3 mA at 0 VDC
High: 2.3 V to 5 V
Low: 0 to 1.0 V
None
Equipment Manual, 03/2021, A5E50810237B AA
Meaning
Meaning
Machine Pushbutton Panel: MPP 464 IE H