nc = no connection
Pin No.
Function
8
Ground
7
nc
6
nc
5
RS232 IN
4
nc
3
nc
2
RS232 OUT
1
Ground/Shield
Mode Switch SW1: Position 1
RS232 Interface
Pin No.
Function
8
Ground
7
nc
6
RTS/CTS IN
5
RS232 IN
4
nc
3
RTS/CTS OUT
2
RS232 OUT
1
Ground/Shield
Mode Switch SW1: Position 2
RS232 with Handshaking Interface
Pin No.
Function
8
Ground
7
nc
6
TTL IN
5
tie to pin 1
4
nc
3
TTL OUT
2
nc
1
Ground/Shield
Mode Switch SW1: Position 3
TTL Interface
Pin No.
Function
8
Ground
7
nc
6
RS422 IN +
5
RS422 IN -
4
nc
3
RS422 OUT +
2
RS422 OUT -
1
Ground/Shield
Mode Switch SW1: Position 4
RS422 Interface
Pin No.
Function
8
Ground
7
RS485 termination; tie to pin 5
6
RS485+
5
RS485 -
4
+5 VDC BIAS OUT
3
nc
2
nc
1
Ground/Shield
Position 8 = 2V offset
Mode Switch SW1:
RS485 2-Wire Interface
Position 7 = 1V offset
Position 6 = standard offset
Pin No.
Function
8
Ground
7
RS485 termination; tie to pin 5
6
RS485 in +
5
RS485 in -
4
+5 VDC BIAS OUT
3
RS485 out +
2
RS485 out -
1
Ground/Shield
Position B = 2V offset
Mode Switch SW1:
RS485 4-Wire Interface
Position A = 1V offset
Position 9 = standard offset
Pin No.
Function
8
Ground
7
nc
6
Manchester/Biphase in +
3
nc
5
Manchester/Biphase in -
4
nc
2
Manchester/Biphase out +
1
Manchester/Biphase out -
Mode Switch SW1: Position 5
Manchester/Biphase Interface
Pin No.
Function
8
Ground
6
Manchester/Biphase in +
3
nc
5
Manchester/Biphase in -
4
nc
2
Manchester/Biphase out +
1
Manchester/Biphase out -
7
Manchester/Biphase
termination
tie to pin 5
Mode Switch SW1: Position 5
Manchester/Biphase Interface
Termination Unit
Pin No.
Function
8
Ground
7
nc
6
tie to pin 3
5
tie to pin 2
4
nc
3
tie to pin 6
2
tie to pin 5
1
nc
Mode Switch SW1: Position F
Test Mode Loopback Interface
TABLE 1:
TABLE 2:
TABLE 3:
TABLE 4:
TABLE 9:
TABLE 8:
TABLE 7:
TABLE 5:
TABLE 6:
9900VMPD: DATA CONNECTIONS
INSTRUCTION
MANUAL
ADDENDUM
14-9900-010907
. . . light years ahead
™
www.fiberoptions.com
80 Orville Drive, Bohemia, NY 11716
631.567.8320 or 800.342.3748
fax: 631.567.8322 or 877.342.3732
See reverse for International contact information.
