Wiring the FM 351
4-6
FM 351 Positioning Module
C79000-G7076-C351-02
Load Current Supplies
The DC power supply for the load current must meet the following requirements:
Only low voltage ≤ 60 V DC safety isolated from the power supply network must be
used for the load current supply. Safe isolation can be implemented, for example,
by adhering to the specifications in
VDE 0100 Part 410 / HD 384-4-41 / IEC 364-4-41
(as functional low voltage with safe isolation) or
VDE 0805 / EN 60950 / IEC 950
(as safety extra low voltage SELV) or VDE 0106 Part 101.
8 Digital Inputs (1I0 to 2I3)
The FM 351 has 4 digital inputs per channel.
You can connect bounce-free switches (24 V current sourcing) or non-contact
sensors (2 or 3-wire proximity switches) to the 8 digital inputs.
The digital inputs are not monitored for short–circuits or wire break and are isolated
from the chassis of the encoder supply and the chassis of the CPU.
A separate LED indicates the state of each input.
8 Digital Outputs (1Q0 to 2Q3)
The FM 351 has 4 digital outputs per channel.
The digital outputs are used to control the power unit. The function of the digital
outputs depends on the control mode. The control mode (see Section 8.3, page
8-6) is selected in the configuration software or in the parameter DB.
The digital outputs are not monitored for short–circuits or wire break and are
isolated from the chassis of the encoder supply and the chassis of the CPU.
A separate LED indicates the state of each output.
Table 4-1 Functions of the Digital Outputs, x for Channel 1 or 2
Output Q
Control Mode
1
2 3 4
xQ0 Rapid speed Rapid/creep
speed
Rapid speed Rapid traverse plus
xQ1 Creep speed Position
reached
Creep speed Creep speed plus
xQ2 Travel plus Travel plus Travel plus Rapid traverse minus
xQ3 Travel minus Travel minus Travel minus Creep speed minus
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