Digital Inputs DIGITAL-IN 1 and 2 (X3A/2, X3A/3):
These inputs are particularly fast and are therefore suitable for latch functions or for high-
speed feedback signals, for example.
PLC compatible (IEC 61131-2 type 1), floating, reference ground is DGND
High: 15...30 V / 2...15 mA , Low: -3...5 V / <1mA
Update rate: Hardware: 2µs
Digital Inputs DIGITAL-IN 3 and 4 (X3A/4, X3A/5):
The PSTOP and NSTOP limit switch evaluation functions, for instance, can be assigned to
these inputs. Choose the function you require in the setup software (“Digital I/O” screen
page).
PLC compatible (IEC 61131-2 type 1), floating, reference ground is DGND
High: 15...30 V / 2...15 mA, Low: -3...5 V / <1mA
Update rate: Software: 250 µs
Digital Inputs DIGITAL-IN21 and 22 (X3A/6, X3A/7):
Pins 6 and 7 on X3A can be used as either inputs or outputs. Choose the function you require
in the setup software (“Digital I/O” screen page).
PLC compatible (IEC 61131-2 type 1), floating, reference ground is DGNDD
High: 15...30 V / 2...15 mA, Low: -3...5 V / <1mA
Update rate: Software: 250 µs
Depending on the selected function the inputs are high or low active.
9.15.2.2 Connector X4
You can thus achieve a restart lock-out for functional safety by using the STO1-Enable and
STO2-Enable inputs in conjunction with an external safety circuit.
Input STO1-ENABLE (X4/7) and STO2-Enable (X4/5)
Floating, reference ground is XGND
20V...30V / 33mA...45mA
These inputs are not compatible with EN 61131-2.
These additional digital inputs releases the power output stage of the amplifier as long as a
24 V signal is applied to these inputs. If the STO inputs go open-circuit, then power will no
longer be supplied to the motor, the drive will lose all torque and coast down to a stop.
Failsafe braking of the drive, if required, must be provided by means of an additional mech-
anical brake, since electrical braking by the drive is no longer possible.
You can find further information and connection examples (➜ # 43)ff.
S748-772 Instructions Manual | 9 Electrical Installation
Kollmorgen | kdn.kollmorgen.com | July 2019 101
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