3.3.3 RS 232 connection ST 3
The RS 232-interface is led from the internal connector X18 to plug ST 3 (type M8 bushing 4 pins),
the assignment is the same as in chapter 3.1.8.
ATTENTION!
Before connecting PC and KFM05A ensure that there are no potential differences by ground
loops or electrostatics. Use a commercial RS 232 data isolator for more safety for PC and
KFM05A.
3.3.4 Optional Keypad connection ST4
The Keypad-interface is led to the bushing ST4 (type Sub-D 9), the assignment is listed below.
Interface 422
Pin assignment:
Pin 1 : nc.
Pin 2 : +8V power supply Keypad
Pin 3 : Tx_/Z Data Out (invers)
Pin 4 : Rx_A Data In
Pin 5 : GND
Pin 6 : nc.
Pin 7 : Tx_Y Data Out
Pin 8 : Rx-/B Data In (invers)
Pin 9: nc.
3.3.5 Status-LED
Green
On
Normal Power OK
Red
Flashing
Error
Red/Green
Off
Power supply failed
3.3.6 Brass bolt M6 ST6
The brass bolt is needed for the grounding of the KFM05a.
To improve the EMC and to avoid scattered and uncontrolled earth currents, the KFM05a should
be connected via this bolt to the protective earth (PE) or earth potential. Cable minimal 10 mm²
3.3.7 Cable Clance M12
The cable clance is used to connect the power supply of the fan for the KFM05a/500L.
3.3.8 Option fieldbus connector ST 4
The fieldbus (for example CANopen) is led to this connector (type Sub-D 9). The pin assignment
should be checked in the fieldbus documentation.
SIEI-AREG GmbH
Gottlieb-Daimler-Straße 17/3
74385 Pleidelsheim Germany
Fon: +49 7144 89736 0
Art.-No.: 918 111e
Page 34 von 60
Rev. 09/14
