DATA-LINC GROUP
12
PN 161-10003-002B
rev 8/03
MDL500 User Guide
Appendix A
Diagrams
Diagram 1
Drawing of the two-wire MDL500/MR enclosure depicting the location of connectors and LEDs.
Diagram 2
Schematic of the RS232 port with pin functions and pinout.
RS232 Pin
Assignment
Description
Signal Direction
1
Protective Ground
Computer
↔
↔
↔
↔
↔
modem
2
Receive Data
Computer
→
→
→
→
→
modem
3
Transmit Data
Computer
←
←
←
←
←
modem
4
Request to Send
Computer
→
→
→
→
→
modem
5
Clear to Send
Not connected
6
Data Set Ready
Not connected
7
Signal Ground
Computer
↔
↔
↔
↔
↔
modem
8
Carrier Detect
Computer
←
←
←
←
←
modem
20
Data Terminal Ready
Not connected
MDL500 rear
+24 VDC
FSK
RS-232
MDL500
CD
RxD TxD PWR
MDL500 front
13 12 11 10 9 8 7 6 5 4 3 2 1
25 24 23 22 21 20 19 18 17 16 15 14
