Rockwell Automation 1785-L20C_L40C, D17856.5.14 ControlNet PLC-5 Programmable Controllers User Manual - Manual (Page 12)

Chapter 1
Installing Your ControlNet PLCĆ5 Processor
1-4
Figure 1.1 and Figure 1.2 show the front panels of the ControlNet
PLC-5 processors.
Figure 1.1
PLCĆ5/20C Processor Front Panel
Battery Status Indicator
(Red)
Processor RUN/FAULT Status Indicator
(Green/Red)
Force Status Indicator
(Amber)
Channel 0 Communication ACTIVE/FAULT
Status Indicator
(Green/Red)
Memory Module Space
Battery Compartment
Use this port with ASCII or DF1 fullĆduplex, halfĆ
duplex master, and halfĆduplex slave protocols.
The port's default configuration supports processor
programming:
KeyswitchĊselects processor mode
Channel 0
Serial PortĊ25Ćpin DĆshell; supports standard EIA
RSĆ232C and RSĆ423; is RSĆ422A compatible ➀
DH+ Programming Terminal Connection
to Channel 1A
8Ćpin miniĆDIN
• one stopĆbit
• BCC error check
• no handshaking
• DF1 pointĆtoĆpoint
• 2400 bit/s
• no parity
Channel 2 ControlNet Status Indicators
(Green/Red)
Channel 2
ControlNet Redundant Media PortsĊ
BNC; dedicated
➀ Channel 0 is optically coupled (provides high electrical
noise immunity) and can be used with most RSĆ422A
equipment as long as:
• termination resistors are not used
• the distance and transmission rate are reduced to
comply with RSĆ423 requirements
ControlNet I/O Status Indicator
(Green/Red)
ControlNet Network Access Port
(NAP)ĊRJ45 connector
Channel 1 Status Indicators (Green/Red)
Channel 1A
3 pin; dedicated DH+
Channel 1B
3 pin; default is remote I/O scanner;
configurable for:
• remote I/O scanner
• remote I/O adapter
• DH+ communication
• unused
Identifying ControlNet PLCĆ5
Processor Components