18 – 262 HEIDENHAIN Service Manual iTNC 530 HSCI
18.8 Power supply of the CC 61xx feedback control unit
Further information and connector layout of X69 and X74 --> See ”Connector designations and pin
layouts” on page 28 – 453.
LED display The CC 61xx features green LEDs (on top) as operational status indicators for each drive-control board;
these LEDs indicate the HSCI address by a blink code.
Device powering the CC 61xx
(alternatives)
Connector for the CC 61xx
power supply
Devices powered by the CC 61xx
HEIDENHAIN inverters:
UE
UR
UV
UVR
HEIDENHAIN low-voltage
power supply unit:
PSL 135
X69 (supply bus) Speed encoders
Position encoders
X74 (additional +5 V)
The CC 61xx features "polyfuses".
Polyfuses are electronic fuses that become highly resistive if an overload occurs and thus separate
defective peripherals (e.g., scales, motor encoders) from the low voltages of the CC 61xx.
Polyfuses are equipped with a self-resetting function ("self-healing effect").