Mahr Digimar 817 CLM Operating Instructions Manual - Communication
126
Mahr GmbH • Digimar 817 CLM
9.1
Description of interfaces
9.1.1
Pin assignment for RS232 Input
RS232 input for hand measuring instruments:
Pin-No.
Identification
Description
1
Not connected
2
RXD
Data input from a hand meas. instrument
3
GND
Ground
4
Request
Output for Data-Request
5
NC
Not connected
6
NC
Not connected
7
+V
+8 V
Supply voltage
for Opto-Interface
8
NC
Not connected
9
NC
Not connected
Description / Sequence
Symbols / Pictures
9.1.3
USB interface Type A
In a USB cable four wires are required, one pair of wires transfer the
data and the other pair supplies the connected instrument with a power
supply of 5 V. Instruments that have a USB specification may obtain
between 100 mA or 500 mA from the USB port, depending on how much
power the port can supply. Instruments that have a performance of up to
2.5 W can also be supplied via a Bus.
1 2 3 4 5
6
7
8
9
9.1.2
Pin assignment for RS232 Output
RS232 to a PC output:
Pin-No.
Identification
Description
1
NC
Not connected
2
RXD
Receive Data
3
TXD
Transmit Data
4
DTR
Data Terminal Ready
5
GND
Ground
6
DSR
Data Set Ready in
7
RTS
Request to send
8
CTS
Clear to send in
9
NC
Not connected
9.