GFK-0356Q Chapter 5 CPUs 5-19
5
CPU351, CPU352, and CPU363 Hardware Features
These three modules are similar in features and functionality. The CPU351 and CPU352 look
identical except for labeling. The CPU363 has the same features as the other two, but the
orientation of its Port 1 and Port 2 connectors is reversed from those of the CPU351 and CPU352,
and its LED indicator lights, key switch, and shield ground connector are in different locations.
(The shield ground connector is on the front panel of the CPU363, labeled “FRAME,” but is
located on the bottom of the CPU351 and CPU352 modules.)
CPU 351
SNP
P1
P2
ON/RUN
OFF/
RS-232
PORT 1
RS-485
PORT 2
STOP
PIN 1
CPU 363
PORT
ON
OFF
PS
RS-232
PORT 1
RS-485
PORT 2
P1
P2
FRAME
PIN 1
PIN 1
Shield Ground
Connector
Figure 5-4. CPUs 351, 352, and 363
CPU Firmware Upgrade
The CPU firmware, which is stored in Flash memory, is loaded through the Port 1 connector on
these modules’ faceplate using Loader software supplied with the firmware upgrade kit. The
IC693CBL316 cable can be used for this purpose (see Chapter 10 for data sheet on this cable).
Keyswitch
This is a standard CPU keyswitch, discussed earlier in this chapter.
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