Dataprobe 4P-MAS Skrócona instrukcja obsługi - Strona 6
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Drukuj stronęModel 4P-MAS-30
INSTALLATION
Master and Switched Ports
Connection to the Switched A-D ports is made
using 25 pin D Subminiature connectors on the
rear of the unit. The following leads are supported
for Asynchronous communications:
Pin
Designation
2
Transmit Data
3
Receive Data
4
Request to Send
5
Clear to Send
6
Data Set Ready
7
Signal Ground
8
Data Carrier Detect
20
Data Terminal Ready
The four switched ports A-D are wired DCE (output data on pin 3,RD). The Master port is wired for as
DTE. To directly connect a terminal device to the Master Port, a Null cable is required. Refer to Figure 3.
Null Connection to Terminal
4P-MAS
Master Port
Control Leads Required vary from device to
device. Consult your operations manual for
details on your specific needs.
Jumpers JP1 through JP4 allows selection of RTS or
DTR as the control lead used in the Code/Lead
Control mode. To access these jumpers, disconnect
the power source and remove the top cover of the 4P-
MAS by loosening the two screws on the underside of
the unit. The jumpers are located behind the B and D
Port Connectors. See Figure 4.
2
2
3
3
4
4
5
5
6
6
7
7
8
8
20
20
Figure 3
Null Modem Connection
Typical
Port A-D
2 TD
3 RD
4 RTS
5 CTS
6 DSR
8 DCD
20
DTR
7 SG
RTS
Mon.
Figure 2
System Diagram
RTS / DTR Selection
D
B
A
B
C
D
Port Select
Page 6
Electronic
4 Way
Switch
Code
Switch
Mon.
Control
C
A
MASTER
A
B
C
D
Figure 4
Component Location
Master
Port
2 TD
3 RD
4 RTS
5 CTS
6 DSR
8 DCD
20
DTR
7 SG
POWER