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BACnet PLC - M4.CPU.21

BACnet PLC – M4.CPU.21

  • Two serial communication ports, optically insulated half duplex RS232/RS485
  • 10/100BASE-TX Ethernet port
  • USB device port, Type B
  • Operating system: Linux 2.6.20.21 /uClibc with Xenomai RT patch
  • EBUS driver supports up to 16 U/I modules
  • Programmable fault state relay output with NO and NC terminals
Category: .

Product Description

M4.CPU.21 executes user's PLC program, manages I/O modules in its configuration and performs communication with uplink systems. Front side has 2 serial communication ports, 1 Ethernet port, LED indicators, USB device service port and a fault state relay output.

Operating system is Linux 2.6.20.21 /uClibc with Xenomai RT patch. Processor module can communicate with up to 16 I/O modules. An ordinary PC, with accompanying software, is used as the programming / debug tool. Programming is performed in two ways:

  • functional block (FB) programming, built in accordance with the IEC 1131-3 standard,
  • in C language using Eclipse environment

Module is compliant with: EN 61131-1:2003, EN 61131-2:2003.

Additional Information

CPU Characteristics

title

Processor

Atmel AT91SAM9G20 (ARM9 architecture), 400 MHz, integrated WDT and RTC

RAM

128 MB SDRAM

Flash

512 MB NAND FLASH

Operating system

Linux 2.6.33.7 / uClibc with Xenomai RT patch

Word length

32 bit

EBUS communication

EBUS driver, up to 16 IO modules

Serial communication

RS232/RS485, half duplex, optically insulated, up to 115.200kbps

Ethernet communication

10/100BASE-TX

USB device port

Full speed (12Mbit per second)

Addressing

– Address defined in the configuration file through a USB if RS485 communication is used
– Defined by external DHCP server if Ethernet communication is used

Digital Output Characteristics

title

Fault output

One programmable NO/NC relay
Switching voltage range: 125 VAC/DC
Switching current: 2 A (30 VDC), 0.5 A (125 VAC)

Scan time

5K instructions one I/O module in 0.8 ms

Response time

5K instructions one I/O module in less than 1.6 ms

Additional Specifications

title

Operating temperature

0 .. 55℃

Storage temperature

-30℃ .. 80℃

Relative humidity

max 95% r.H., no condensation

Protection degree

IP20

EBUS consumption

250mA

Weight
150 g
Dimensions
108 × 86 × 27 mm

Downloads

Documentation

Technical Data Sheet for M4.CPU.21

Drivers