HEIDENHAIN TNC 410 M Technical Manual page 145

Connection
overview of adapter
module
2 – 96
Danger
Do not engage or disengage any connecting elements while the unit is
under power!
X69a – X69b
Ribbon cable to X69 on the control
X75
HEIDENHAIN Technical Manual for Inverter Systems and Motors
Supply bus from the
power supply units
Service connector (exclusively for service
purposes)