12
ASYNC/SYNC INDUSTRIAL LINE DRIVER
Switches S2-1 and S2-2: Word Length
Switches S2-1 and S2-2 are set in combination to determine the word length for
asynchronous data, including the start and stop bits.
S2-1
S2-2
Setting
Off
On
8 bits
On
On
9 bits
Off
Off
10 bits
On
Off
11 bits
Switch S2-3: Extended Signaling Rate
The setting for switch S2-3 determines the range of variability the Async/Sync
Industrial Line Driver “looks for” in asynchronous data rates (that is, the actual
variance from a given frequency level the Line Driver will tolerate).
S2-3
Setting
Off
-2.5% to +1%
On
-2.5% to +2.3%
Switches S2-4 and S2-5: RTS/CTS Delay
The combined settings for switches S2-4 and S2-5 determine the amount of delay
between the time the Line Driver “sees” RTS and when it sends CTS. Options are
no delay, 7 ms, and 53 ms.
S2-4
S2-5
Setting
On
On
7 ms
Off
On
53 ms
On
Off
No delay
Off
Off
No delay
Switch S2-6 and S2-7: 2-Wire/4-Wire Mode Selection
The setting for switch S2-6 and S2-7 determines whether the Async/Sync Industrial
Line Driver is operating in 2-wire or 4-wire mode.
S2-6
S2-7
Setting
On
On
4-wire (half duplex)
On
Off
4-wire (full duplex)
Off
On
2-wire (half duplex)