Wiring the FM 350-1
3.1 Pin assignments of the front connector
FM 350-1 Counter module
30 Manual, 05/2011, A5E03648639-01
Digital Outputs DO0 and DO1
The FM 350-1 features two digital outputs, DO0 and DO1, for directly triggering control
processes.
The digital outputs are supplied via the load voltage 2L+.
The digital outputs are optically isolated from the bus of the S7-300 and the counter inputs.
The digital outputs are source outputs and can be loaded with a load current of 0.5 A. They
are protected from overload and short-circuit.
Note
Relays and contactors can be connected direct without external circuitry.
The time characteristics of the digital outputs depend on the parameterization and are
explained in more detail in the chapter Operating Modes, Parameters and Commands
(Page 83).
Load Voltage 2L+/ 2M
For supplying digital outputs DO0 and DO1, a load voltage of 24 V must be supplied to the
module via terminals 2L+ and 2M.
An integrated diode protects the module from polarity reversal of the load voltage.
The load voltage 2L+/2M is not monitored by the FM 350-1.
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