DL28 Remote Readout and Control

 

Features

  • Data communication connections between measuring and control devices in a heating substation
  • Integration of substations into remote monitoring and control systems.DL28 fotografija
  • Data logging
  • 32-Bit CPU @ 454MHz
  • Linux operating system
  • 256MB DDR2 SDRAM
  • microSD card, push-push connector
  • Ethernet interface
  • USB Host, Device, On-The-Go ports
  • RS-232 and RS-485 DCE serial interfaces
  • M-Bus Master and Slave ports
  • Galvanically isolated ports
  • DC power supply (18-36V)
  • 35mm DIN mounting rail

 

Description

 

DL28 is a communications processor that handles data communication connections between measuring and control devices in a heating substation and their integration into remote monitoring and control systems (SCADA) by using diverse transfer routes. DL28 can be connected to SCADA programs in several ways: via local area networks (LAN), wireless computer networks (WLAN), CATV modems, GSM/GPRS/3G routers, as well as via other standard and wireless modems. An established communication link allows for real-time remote monitoring and read-outs of process variables  at the heating substation, as well as of alarm conditions.
The connection to the Siemens PLC supports the “multi-master token ring“ PPI protocol, since read-outs from the PLC device are shared by the DL28 device and the display, which is the other master in the ring.
The DL28 has a plastic enclosure for mounting with a 35mm DIN mounting rail. The front panel features power supply connectors, connectors for USB peripherals, memory cards, Ethernet and serial communication, as well as LED indicators.
The communications processor supports microSD memory cards via a push-push connector.

Block diagram

DL28 Block Diagram ENG

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Specifications
 Processor panel
Central processor 32-Bit MCU Core ARM926EJ, 454MHz
Operating system Linux 2.6.35
Memory 256MB DDR2 SDRAM
Disc 2GB Flash
USB 1 x USB2.0 Hi-Speed Host, 1 x OTG
Ethernet RJ45, 10/100TBase
Memory card microSD, push-push connector
Real Time Clock (RTC) Implemented (powered by a CR1220 battery)
Communications panel
USB 1 x USB2.0 device, galvanically isolated, FT232R
Serial ports Galvanically isolated with send and receive LED indicators
S1 – RS-232C (TD, RD, DTR, RTS, CTS, RI, DCD signals)
S2 – RS-232C (TD, RD, RTS, CTS signals) or RS-485 (A+ & B-)
S3 – RS-232C (TD, RD, RTS, CTS signals) or RS-485 (A+ & B-)
M-Bus panel
Serial ports Galvanically isolated with send and receive LED indicators
S4 – M-Bus Master, up to 3 Slave devices
S5 – M-Bus Slave
S6 – RS-232C (TD, RD, RTS, CTS signals) or RS-485 (A+& B-)
Common characteristics
Power supply IP40
Power consumption from -20°C to +55°C and from 0 to 95% RH (without condensation)
Dimensions 70 x 85(91) x 73mm
Mounting DIN rail 35 mm