Siemens SIMATIC FM 353 Manual page 46

Wiring
4 digital inputs (DI1...4)
All inputs have equal priority. Switching functions are allocated to an input number
by way of machine data; input polarity is selected in the same way (starting and
shutdown slopes).
These fast inputs are PLC-compatible (24 V current-sourcing). Switches or con-
tactless sensors (2-wire or 3-wire sensors) can be connected.
Possible uses include:
S As reference-point switches
S As switches for external Start/Stop, external block change
S As touch probes
See Section 5.3.1 for further applications.
Table 4-6
1 signal, voltage range
1 signal, power consumption
0 signal, voltage range
Signal delay 0 → 1
Signal delay 1 → 0
"Controller message" (RM) input
One message signal from the drive power section can be connected to the
"RM_P/RM_N" terminals.
The message signal is specified in MD37 (see Section 5.3.1) and can be one of
the following (see Section 9.7):
S Servo controller ready (alternative to connector X2)
S Current-sourcing pattern zero signal for reference point approach
S Zero pulse, external (e.g. reference point switch signal) for reference point ap-
proach
Note
The "controller message" input is configured as an isolated optical coupler input.
This allows both a current-sourcing and a current-sinking output of the power sec-
tion to be connected. For details about wiring see Section 4.5.
4-14
Electrical parameters of digital inputs
Parameters Value Unit
11 − 30 V
6 − 15 mA
−3 − 5 V or input open
15
µs
150
µs
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
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