erc ERC-M - Assembly of RS232 Cable

EASY-ROTOR-CONTROL M V2.2 Instructions
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2.2 Assembly of RS232 cable
Materials needed:
- Cable with 3.5mm Stereo phone-jack
- DSUB-connector 9 pole female
- DSUB-case for 9 pole
Pinning of DSUB seen from the connector-frontside
As the delivered cables differ with their colours, it has to be measured which of the inner cables is
connected to what contact of the phone-jack. Alternatively to the 3-wire cable a 2-wire cable with
shielding can be delivered. For this kind of cables the both shielding have to be twisted together. The
shielding is representing GND.
GND: inner contact of the phone-jack : to PIN 5 of the D-SUB
RXD: middle contact of the phone-jack : to PIN 2 of the DSUB
TXD: tip-contact of the phone-jack : to PIN 3 of the DSUB
NOTE: If you use the ERC-M in MASTER-SLAVE-mode over RS232, the pins for RXD and
TXD must be crossed for the Master-ERC-M: TXD to Pin 2 and RXD to Pin3 of the D-SUB.