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Example #4
900 Control Station
Connect to HC900 RS485 port with unterminated switch settings. S2 port is RS485 terminated by default;
S1 port can be configured as RS485.
RS-232
See manual 51-52-25-107 for full details.
Note: Ethernet connections will provide faster performance than RS-485.
Example #5
900 Control Station
Ethernet
or
RS-485
(Non-redundant)
Connect to C70R using either RS-485 or Ethernet. Communication redundancy is not supported using both
RS 485 and Ethernet. Communications to the Lead CPU is maintained following a CPU failover event.
51-52-33-157 Rev. 6
HC900
Controller
C30, C50, C70 CPU
RS 485
2000 ft. max.
RS-485 unterminated
Ethernet
Switch
B
A
100 base-T
Up to 100m
RS-485 terminated
(last link in network)
Experion LS, SpecView
rd
or 3
Party Software
10/100 base-T
Ethernet support
HC900 Redundant Controller
C70R CPU
RS-485 with external
bias, unterminated
Dual
Page 9 of 14
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