AutomationDirect DL205 User Manual

DL205 User Manual, 4th Edition, Rev. D
4-26
Chapter 4: System Design and Configuration
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Add a Serial Remote I/O Master/Slave Module
In addition to the I/O located in the local base, adding remote I/O can be accomplished via
a shielded twisted-pair cable linking the master CPU to a remote I/O base. The methods of
adding serial remote I/O are:
• DL240 CPUs: Remote I/O requires a remote master module (D2–RMSM) to be installed in the
local base. The CPU updates the remote master, then the remote master handles all communication
to and from the remote I/O base by communicating to a remote slave module (D2–RSSS) installed
in each remote base.
• DL250–1 and D2–260 CPU: The CPU’s comm port 2 features a built-in Remote I/O channel. You
may also use up to seven D2–RMSM remote masters in the local base as described above (you can
use either or both methods).
Remote I/O points map into different CPU memory locations, therefore it does not reduce the
number of local I/O points. Refer to the DL205 Remote I/O manual for details on remote
I/O configuration and numbering. Configuring the built-in remote I/O channel is described
in the following section.
The figure below shows one CPU base, and one remote I/O channel with six remote bases.
If the CPU is a DL250–1 or DL260, adding the first remote I/O channel does not require
installing a remote master module (use the CPU’s built-in remote I/O channel).
DL230 DL240 DL250–1 DL260
Maximum number of Remote Masters supported in the local
CPU base (1 channel per Remote Master)
none 2 7 7
CPU built-in Remote I/O channels none none 1 1
Maximum I/O points supported by each channel none 2048 2048 2048
Maximum Remote I/O points supported none Limited by total references available
Maximum number of Remote I/O bases per channel(RM–NET) none 7 7 7
Maximum number of Remote I/O bases per channel (SM–NET) none 31 31 31
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240
250-1
260
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Remote Slaves
Maximumof
7remote bases
per channel
Remote Masters
Masterscan go in any slot except nexttoCPU.
Allowabledistanceisfromfarthestslave to theremotemaster.
Maximumof:
7 per CPU base (DL250-1 & DL260)
(for DL250-1 & DL260 the bottom port of
the CPU can serve as an eighth master)
2 per CPU base (DL240)

AutomationDirect DL205 Specifications

General

Brand	AutomationDirect
Model	DL205
Category	Controller
Language	English