Allen-Bradley SLC 500 Manual

QUICKDESIGNER Allen-Bradley •
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• 17
SLC 5/04 Data Highway Plus
Data Highway Plus implements peer-to-peer communication with a token-passing scheme to rotate link
mastership among a maximum of 64 nodes. Since this method does not require polling, it helps provide
time-efficient reliable data transport.
The SLC 5/04 processor lets you operate DH+ communication protocol by means of the DH+
communication channel 1. The SLC 5/04 also supports full-duplex DF1 protocol using the DF1
channel 0.
The 3-pin connector is for actual DH+ communication and the 8-pin connector is for monitoring DH+
communication.
The DH+ LED provides an indication of the condition of the network communication. The color can be
green or red. A steady on condition indicates the processor is actively communicating on the network.
Flashing green indicates there are no active nodes on the network. Flashing red indicates there are
duplicate nodes on the link with the same node address.
SLC 5/04 CPU
RUN
FLT
BATT
FORCE
DH+
RS232
RUN REM PROG
DH+
Channel 1
DF1
Channel 0
SLC 5/04 DH+ Connection
The drawing shows a possible configuration for DH+.
SLC5/04 Modular Controller
SLC 5/04 CPU
RUN
FLT
BATT
FORCE
DH+
RS232
RUN REM PROG
PLC 5/15
LINE 2 BLUE
LINE 1 CLEAR
SHIELD
CN1
QUICKPANEL
DATA
HIGHWAY
PLUS
MODULE

Allen-Bradley SLC 500 Specifications

General

Programming Software	RSLogix 500
Communication Ports	RS-232, DH-485, DH+
Power Supply	120/240V AC or 24V DC
Programming Languages	Ladder Logic
Operating Temperature	0°C to 60°C (32°F to 140°F)
Relative Humidity	5% to 95% (non-condensing)
Memory	4K to 64K words (depending on the processor)