Siemens 6DD1640-0AH0 board
Technical data of product parameters
Ground fault detection circuitry on the Sequence of 6DD1640-0AH0Events module with Contact
Inputs activates when the input or return line for any channel finds a low impedance
(<10K ohms) path to earth ground. A single wire with a ground fault will not cause
an error in the point data, but multiple ground faults (if they include input and return
lines) could cause faulty data (that is, channels appearing as if their contacts are 6DD1640-0AH0
closed when they are really open).
When a ground fault occurs, the external error LED lights, and the GND Fault bit
11 in the Status Register is set. If the GND Fault Attention Enable bit 8 is set in the
Configuration Register, a ground fault is seen as a catastrophic error causing an
attention status to be sent back to the Controller. See Figure 20-3 for ground fault 6DD1640-0AH0
detection circuitry.Each Personality module has a simplified wiring diagram label on its side, which
appears above the terminal block. This diagram indicates how the wiring from the
field is to be connected to the terminal block in the base unit. The diagrams for the
Sequence of Events digital input Personality modules are illustrated in Figure 20-5. 6DD1640-0AH0
The following table lists and defines the abbreviations used in these diagrams.Word address 13 (D in Hex) is used to configure the module and provide status
information to the Controller. The status register can be read by using the Point
Information window at an Operator Station (see the Bit Pattern Field on the
Hardware Tab)
Product picture display
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