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RS-232↔485/422 CONVERTERS
Table 1 (continued). DCE Jumper Settings.
Function Jumper Requirements
5. Enable RS-485 driver
a. RS-485 driver enabled by
RS-232 control leads
• by RTS W15 in A-B position and
W9 in 0-ms position
W9 in 10-ms position
W9 in 30-ms position
b. RS-485 driver enabled by data W15 in B-C position and
• Disable timeout delay W17 msec
A70
B7
C2
D 0.7
E0.15
c. RS-485 driver constantly enabled W9 in ON position
6. Half-duplex turnaround delay W8 in HALF position and
• 0-msec turnaround delay W16 in position A
• 0.1-msec turnaround delay W16 in position B
• 1-msec turnaround delay W16 in position C
• 5-msec turnaround delay W16 in position D
• 35-msec turnaround delay W16 in position E