Hardware reference guide
CPU Modules
35013379 02 October 2007 189
Specifications The following table shows the specification for the 140CPU53414 CONTROLLER 
module. 
Specifications
User Logic/Reference Capacity 984 Ladder 
Logic
Discrete  Register Extended 
Register
64 k words  64 k 57 k 96 k
57,766 4XX registers max
Only if:
0XXX = 16 and 
1XXX = 16 and
3XXX = 16
Reference Capacity
Discrete  64 k - any mix
Local I/O (Main Backplane)
Maximum I/O Words  64 In and 64 Out*
Maximum Number of I/O Racks 2 (Requires Expander)
Remote I/O 
Maximum I/O Words per Drop 64 In and 64 Out*
Maximum Number of Remote Drops 31
Distributed I/O 
Maximum Number of Networks per 
System
3**
Maximum Words per Network. (For 
every DIO drop, there is a minimum 
of words input of overhead.)
500 In and 500 Out
Maximum Words per Node 30 In and 32 Out 
Maximum Number of Option 
Module Interfaces
Supports up to six network modules (i.e., Modbus Plus, 
Ethernet and Multi-Axis Motion option modules) using 
the option module interface technique.
Note: Only two Modbus Plus modules can have full 
functionality, including Quantum DIO support.
Watchdog Timer 250 ms (S/W adjustable)
Logic Solve Time  0.1 ms/k to 0.5 ms/k
Battery 3 V Lithium
Service Life 1200 mAh
Shelf Life 10 years with 0.5% loss of capacity per year
Battery Load Current @ Power-off
Typical 14 μA
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com










