Hardware reference guide

CPU Modules
126
35013379 11/2011
* This information can be a mix of Discrete or Register I/O. For each word of register
I/O configured, one word of I/O words must be subtracted from the total available.
The same holds true for each block of 8 bits or 16 bits of Discrete I/O configured -
one word of Register I/O must be subtracted from the total available.
**Requires the use of the 140NOM21x00 Option Processor.
LED Indicators and Descriptions
The following figure shows the CPU11303 LED indicators.
The following table shows the CPU11303 LED descriptions.
Bus Current Required 790 mA
Power Dissipation 3.95 W
TOD Clock +/- 8.0 seconds/day 0 ... 60° C
Maximum Number of NOM, NOE, and
MMS modules (any combination)
2
Specifications
LED Descriptions
LEDs Color Indication when On
Ready Green The CPU has passed powerup diagnostics.
Run Green The CPU has been started and is solving logic (see the following
table for Run LED error codes).
Modbus Green Communications are active on the Modbus port.
Modbus + Green Communications are active on the Modbus Plus port.
Mem Prt Amber Memory is write protected (the memory protect switch is on).
Bat Low Red The battery needs replacing.
Error A Red Indicates a communications error on the Modbus Plus network.