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2.2
RS485 TERMINATION SETTINGS, CONTINUED
2.2.2 Cascade Wiring Configuration
Multiple units can also be wired from any of the RS485 output ports (O/P) to the RS485
Input connector. This wiring configuration is called cascading. If units are connected
using a cascade wiring configuration, the termination on all HDCD8TP units are set to
ON. (Refer to Figure 7.)
+
Power
12 Volts DC
240 0 Bau d
480 0 B aud
+
-
3
8 ON
3
8 ON
960 0 Bau d
192 00 Ba ud
3
8 ON
3
8 ON
Power
PC Control
RS485 Input
RS485
RS485 Input/
12 Volts DC
Terminated
Uplink
O N
1 2
240 0 B aud
480 0 B aud
-
+
3
8 ON
3
8 ON
960 0 B aud
192 00 Ba ud
3
8 ON
3
8 ON
Power
PC Control
RS485 Input
RS485 Input/
RS485
12 Volts DC
Terminated
Uplink
O N
1 2
240 0 Baud
480 0 B aud
-
+
3
8 ON
3
8 ON
960 0 Baud
192 00 Ba ud
3
8 ON
3
8 ON
Power
PC Control
RS485 Input
RS485 Input/
RS485
12 Volts DC
Terminated
Uplink
O N
1 2
Rev. B
RS485 Data
Termination On All Units
To/From the
Transmitter
240 0 Bau d
480 0 Baud
-
3
8 ON
3
8 ON
960 0 Bau d
192 00 Ba ud
3
8 ON
3
8 ON
PC Control
RS485 Input
RS485 Input/
O/P 1
RS485
Terminated
Uplink
O N
1 2
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
O/P 8
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
O/P 8
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
Figure 7. Cascade Wiring Multiple HDCD8TP Units
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
O/P 8
240 0 Baud
-
+
3
8 ON
960 0 Baud
3
8 ON
Power
PC Control
RS485 Input
12 Volts DC
O N
1 2
240 0 Bau d
-
+
3
960 0 Bau d
3
Power
PC Control
RS485 Input
12 Volts DC
O N
O/P 8
7
480 0 B aud
3
8 ON
192 00 Ba ud
3
8 ON
RS485
RS485 Input/
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
Terminated
Uplink
480 0 Baud
8 ON
3
8 ON
192 00 Ba ud
8 ON
3
8 ON
RS485 Input/
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
RS485
Uplink
Terminated
1 2
HAMU000876
O/P 7
O/P 8
O/P 6
O/P 7
O/P 8
12/29/04
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