Service Manual TNC 407 / TNC 415 - heidenhain - DR. JOHANNES ...

Kundendienst
HEDENHAIN
SERVICE MANUAL TNC 407/415
Issue: 01.09.19958
Page 56
14.3 Connecting Cables and Adaptors for the RS 232C Interface
14.3.1 Wiring Diagram and Adaptor of the RS 232C Interface
X2,, Cable RS232 i LE RS 232 Adaptor Block
LE 407/415 Id.No. 239 760 _. Id.No. 239 758 01
LJ 8
DTR 6
SIGNAL GND 7
DSR 20
Signal Designations:
TX0 Transmit Data
RXD Receive Data
RTS Request to Send
CTS Clear to Send
DSR Data Set Ready
DTR Terminal Ready
Data Transfer Cable
Id.No. 242 869 01
FE 401/B
ME 101
In general simplified wiring of the
data transfer cable is sufficient
for the transfer via the RS 232C
interface with DCl/DC3 protocol.
CHASSIS GND
lx0
RX0
RTS
CTS
DSR
SIGNAL GND
The data lines and the control lines of the cable between the LE 407/415 and the RS 232C adaptor block
(Id.No. 239 760 ..) are transposed. The pin layout at the connector X21 of the LE 407/415 corresponds that
of a data circuit terminating equipment (DCE). Due to the transposed data lines and control lines in the cable
between the LE 407/415 and the RS 232C adaptor the allocation at the RS 232C adaptor corresponds to a
data terminal equipment (DTE). Thus, the external units may be connected to the RS 232C adaptor via the
standard HEIDENHAIN data transfer cable (Id.No. 242 869 01).
The RS 232C data interface has different pin assignments at the logic unit X21 and at the
RS 232C adaptor block.
DTR