Hardware reference guide

CPU Modules
35013379 11/2011 173
*This information can be a mix of Discrete or Register I/Os. 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 two 140NOM21x00 Option Modules.
LED Indicators and Descriptions
The following figure shows the LED indicators.
Battery Load Current @ Power-off
Typical 14 μA
Maximum 420 μA
Communication
Modbus (RS-232) 2 serial port (9-pin D-shell)
Modbus Plus (RS-485) 1 network port (9-pin D-shell)
General
Diagnostics Power Up Runtime
RAM RAM
RAM Address RAM Address
Executive Checksum Executive Checksum
User Logic Check User Logic Check
Processor
Bus Current Required 1250 mA
Power dissipation 9 W
TOD Clock +/- 8.0 seconds/day 0 ... 60° C
Operating Temperature 0 ... 45° C
Specifications