140 CPU 434 12A/U Specifications

General Specifications

140 CPU 434 12U

This module is the version of the controller that is managed with Control Expert programming software.

NOTE: You can use only Control Expert software to program the 140 CPU 434 12U controller.

NOTE: The 140 CPU 434 12U controller is not compatible with Hot Standby topologies.
140 CPU 434 12A

This module is functionally identical to the non-A version. However, the following must be considered:
- If you are using the module in a Hot Standby topology, then you must use either two non-”A” models or two A models.
- The A version has a unique flash executive.
  
  NOTE: The “A” version and non-”A” flash executives are not interchangeable.
- Schneider Electric software (Concept, ProWORX, and Modsoft) supports the “A” version. Any existing or new 140 CPU 434 12 program configuration will load into a 140 CPU 434 12A without any modifications.
  
  NOTE: You can flash the “A” version with the executive of the “U” version to become compatible with the Control Expert software.
  
  NOTE: A 140 CPU 434 12A flashed with the executive of the “U” version is not compatible with Hot Standby topologies.

Communication ports	2 Modbus (RS-232)
Communication ports	1 Modbus Plus (RS-485)
Bus current required	1250 mA
Max. number of NOM, NOC, NOE, PTQ PDP MV1 and MMS modules supported (any combination)	6
Key switch	Yes

NOTE: This CPU can support up to 3 MODBUS networks.

Processor

Model	Intel 486
Clock speed	66 MHz
Math processor	Yes, on-board
Watchdog timer	250 ms S/W adjustable

Memory

Internal memory (max.)

1056 k

NOTE: Not all of the Internal memory is available for the user program due to memory overhead, such as user, system, configuration, diagnostic data, etc. For more information see Memory usage.

Reference Capacity

Discretes	65528
Registers	64974

Local I/O

Max. I/O words	unlimited I/O
Max. I/O racks	2

S908 Remote I/O

Max. I/O words per drop	64 in / 64 out*
Max. number of remote drops	31
* This information can be a mix of discrete or register I/O. For each word of configured I/O, one of the I/O words must be subtracted from the total available.

Ethernet Remote I/O

Not supported

Distributed I/O

Number of networks per system	1 (3**)
Max. words per network	500 in / 500 out For every DIO drop, there is a minimum of two words input of overhead
Max. words per node	30 in / 32 out
Max. number od DIO drops/network	64
** Requires the use of the 140 NOM 21• 00 option module.

Change Configuration On The Fly (CCOTF)

Not supported

Battery and Clock

Type	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: 7 μA @ 25 °C (ambient temperature)
Battery load current @ power-off	maximum: 210 μA @ 60 °C
TOD clock	+/- 8.0 s/day @ 0...60 °C

Diagnostics

Power-up	RAM RAM address Executive Checksum User Logic Check Processor
Run time	RAM RAM address Executive Checksum User Logic Check