9.15.3.1 Connectors X3A, X3B
Ready-to-operate contact BTB/RTO (X3B/14, X3B/15)
Operational readiness (terminals X3B/14 and X3B/15 ) is signaled by a floating relay con-
tact. The contact is closed when the servo amplifier is ready for operation, and the signal is
not influenced by the enable signal, the I²t-limit, or the brake threshold.
All faults cause the BTB/RTO contact to open and the output stage to be switched off (if the
BTB/RTO contact is open, the output stage is inhibited -> no power output). Error messages
are listed on page (➜ # 123).
Programmable digital outputs DIGITAL-OUT 1 and 2 (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 (OxMODE). The outputs are floating outputs, so the 24 V switching
voltage must be provided by an external supply.
If they are programmed as digital outputs, messages from pre-programmed functions stored
in the servo amplifier can be output here. A list of these pre-programmed functions can be
found on the “I/O digital” screen page of our setup software DRIVEGUI.EXE.
If an output is to be freshly assigned to a pre-programmed function, then the parameter set
must be saved in the EEPROM of the servo amplifier and a reset has to be carried out (with
the amplifier setup software for example).
9.15.3.2 Connector X4
Status messages STO1-Status (X4/8) and STO2-Status (X4/6):
Pin 6 and 8 on X4 report the status of the STO-Enable inputs. The outputs are floating out-
puts, so the 24 V switching voltage must be provided by an external supply via X3A/8.
S748-772 Instructions Manual | 9 Electrical Installation
Kollmorgen | kdn.kollmorgen.com | July 2019 103
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