140 CPU 534 14B/U Specifications

General Specifications

This module is functionally identical to the non-B version. However, the following should be considered:

If you are using the module in a Hot Standby topology, then you must use either two non-B models or two B/U models.
The B/U model requires a new flash executive.
The B/U and the non-B flash executives are not interchangeable.
Schneider Electric software supports the B/U model. Any existing or new 140 CPU 534 14 program configuration will load into a 140 CPU 534 14B/U without any modifications.

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 network

Processor

Model	Intel 486 DX4
Clock speed	100 MHz
On-board math processor	Yes, on-board
Watchdog timer	250 ms S/W adjustable

Memory

Internal memory (maximum)

2972 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 of DIO drops per 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/year
Battery load current @ power-off	typical: 14 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