HEIDENHAIN PT 855 for Milling - Manual (Page 102)

II - 4 Data Interface
100 Technical Information POSITIP 855
X 3 1 ( R S - 2 3 2 - C / V . 2 4 )
13 10 7 4 1
14 18 21 25
Fig. 41: Pin layout of RS-232-C/V.24 data
interface
II - 4
Data Interface
The POSITIP's data interface allows you to save programs and
operating parameters on diskette, or print out or save coordinates.
Chapter I - 4 describes how to transfer programs, and chapter
II - 2 describes how to transfer operating parameters.
This chapter covers what you need to know about setting up the
data interface:
• Pin layout of data interface
• Signal levels
• Wiring of the connecting cable and connectors
• Baud rate (data transfer speed)
• Data format
Connections
The RS-232-C/V.24 serial port is located on the rear panel. The fol-
lowing devices can be connected to this port:
• HEIDENHAIN FE 401 Floppy Disk Unit
• Printer with serial data interface
• Personal computer with serial data interface
The HEIDENHAIN FE 401 floppy disk unit is ready to run
as soon as it is connected to POSITIP's data interface.
Interface X31 complies with the recommendations
in EN 50 178 for separation from line power.
Pin layout on the POSITIP data interface
Pin Assignment
1 CHASSIS GND – Chassis ground
2 TXD – Transmitted data
3 RXD – Received data
4 RTS – Request to send
5 CTS – Clear to send
6 DSR – Data set ready
7 SIGNAL GND – Signal ground
20 DTR – Data terminal ready
8 to 19 Do not assign
21 to 25 Do not assign
Signal level
Signal Signal level Signal level
"1" = "active" "0" = "inactive"
TXD, RXD – 3 V to – 15 V + 3 V to + 15 V
RTS, CTS + 3 V to + 15 V – 3 V to – 15 V
DSR, DTR