Terminal Name Inputs/
outputs
Function
5 V encoder RS
422, symmetrical
24 V encoder,
asymmetric
24-V pulse encod‐
er with direction
level
24 V initiator
33 1Q0 OFF Digital output 1Q0
34 1Q1 OFF Digital output 1Q1
35 -
36 -
37 -
38 -
39 -
40 -
Counter 2
41 2I0 ON Digital input 2I0
42 2I1 ON Digital input 2I1
43 2I2 ON Digital input 2I2 (set counter)
44 -
45 2Q0 OFF Digital output 2Q0
46 2Q1 OFF Digital output 2Q1
47 2L+ ON 24 V load voltage for the digital inputs and outputs
48 2M ON Load voltage ground for digital inputs and outputs
Note
The circuits for the counter inputs (encoder power supply, encoder signals) are isolated
electrically toward the ground of the CPU. Hence you must connect terminal 4 (1M) to the
ground of the CPU with a low impedance!
If you supply the encoders with external voltage, you must also connect the mass of this external
voltage supply to the ground of the CPU.
Auxiliary voltage 1L+, 1M
To supply the 5 V and 24 V encoders with voltage, connect a 24 DC V to the 1L + and 1M
terminals.
An integrated diode protects the module from reversing the polarity of the auxiliary voltage.
The module monitors whether the auxiliary voltage is connected.
5.2 VDC encoder power supply
The module generates a 5.2 VDC voltage from the 1L+/1M auxiliary voltage at a maximum
current of 300mA per count channel; this voltage is available on the respective "DC5.2V"
terminal to supply a 5 V encoder with short circuit-proof voltage.
Wiring
4.2 Terminal assignment of the front connector
Counter module FM 450-1
28 Equipment Manual, 03/2022, A5E03648739-AC
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