Patton electronic 2085 Network Card User Manual


 
3.4 CONFIGURATION SWITCH APPLICATIONS
The switch settings
generally
needed to configure the Model 2085
for various applications are shown in the table below. Note: Do not
change switch settings until you have
carefully
read Section 3.3.
S1-4: Echo Mode
The setting for switch S1-4 determines whether the Model 2085
echoes data back to the transmitting device (half-duplex mode only).
S1-4
Setting
On Echo On
Off Echo Off
S1-5: Carrier Control Method
The setting for switch S1-5 determines whether the carrier is
“Constantly On” or “Controlled by RTS”. This setting allows for
operation in switched carrier, multipoint and/or hardware handshaking
applications.
S1-5
Setting
On Controlled by RTS
Off Constantly On
S1-6: Receive Impedance
The setting for switch S1-6 selects the impedance of the input
receiver. You may select either a “low” impedance of 120 Ohms or a
“high” impedance of 16 kOhms. By selecting the proper impedance for
each drop, there may be up to 50 receivers in one application.
S1-6
Setting
On Low (120 Ohm)
Off High (16 kOhm typical)
S1-7 and S1-8: 2-Wire/4-Wire Modes
Switches S1-7 and S1-8 are set together to determine whether the
Model 2085 is in 2-wire or 4-wire operating mode. Note: 2-wire mode
is half-duplex only.
S1-7 S1-8 Setting
On On 2-wire mode
Off Off 4-wire mode
7 8
S1-1: “Xmt Off” Imp. OFF OFF OFF OFF OFF
S1-2: “Xmt Off” Imp. OFF OFF OFF OFF OFF
S1-3: RTS/CTS Delay ON ON ON OFF ON
S1-4: Echo OFF OFF OFF OFF OFF
S1-5: Carrier Control OFF ON ON Master-OFF ON
Slaves-ON
S1-6: Rcv Impedance ON ON ON Master - ON
Slaves - OFF
Last Slave - ON
S1-7: 2-wire/4-wire OFF OFF ON OFF ON
S1-8: 2-wire/4-wire OFF OFF ON OFF ON
TYPICAL MODEL 2085 APPLICATIONS
Point-to-Point
Switch
Settings
Multi-point
4W 2W 4W 2W4W HDX