PLC Technology
Data Access Server

TOPAZ IEC DAS MX681 Data Access Server

The device is a freely programmable Linux-based controller designed for creating systems for process control, remote control, and operational control in the energy sector, various areas of industry, municipal engineering, and agriculture. Thanks to its modular design, a wide range of modifications is available based on the number of data ports and scope of functions, which helps to select the ideal option for a particular task.
  • Specifications
  • Legend


Feature Value


CPU core 2 core ARM Cortex-A7
CPU frequency 1000 MHz
RAM 1024 MB
ROM (Read Only Memory firmware) 8 GB (eMMC)
ROM (expansion memory) up to 2 TB (SSD)
Operating system Linux

Ethernet interface

Ports up to 32
Connectors RJ-45, LC, SFP 
Transmission speed up to 1000 Mbit/s
Communication protocols IEC 60870-5-104, IEC 61850
Network protocols and functions IPv4, IPv6, TCP, UDP
Network redundancy protocols RSTP, PRP/HSR
Clock synchronization protocols NTPv3, SNTP, PTPv2

Serial interfaces

Ports up to 32
Interface variants RS-232, RS-422, RS-485
Connection interface Terminal block (RS-232, RS-422, RS-485), DB9 (RS-232)
 Transmission speed up to 115,200
Communication protocols IEC 60870-5-101, Modbus RTU

Power supply specifications

Power supply variants  2 inputs 12/24 V (DC);
1 (2) input 110/220 V (AC/DC)
Current consumption up to 400 mA
Power supply range 24 V 10 ÷ 30 V
Power supply range 220 V 90 ÷ 265 V (AC), 100 ÷ 365 V (DC)
Power supply frequency range (220 V) 45 ÷ 55 Hz

Design specifications

Mounting type DIN rail 35 mm
Case material plastic
Case IP 20 plastic
Weight, kg, max 2

Dimensions (width x height x depth)

Basic modification 45 x 99 x 114.5 mm
Extended modification 225 x 108.5 x 124 mm max

Reliability performance

Mean time between failures, h 140,000 hours
Average lifetime 30 years
Verification frequency 10 years

Operating environment

Ambient air temperature –40 to +70 °C 
Average humidity (non-condensing) 5 ÷ 95 % at 30 °C
Air pressure 60 ÷ 106.7 kPa

Additional functions

3G or 4G modem

SIM cards 2
SIM card format mini-SIM, SIM-chip (optional)
Communication standards CSD, GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, DC-HSPA+, LTE
Antenna 1 or 2 (MIMO support)
Antenna jack SMA

Time signal receiver (GLONASS/GPS)

tracking channels 33
acquisition channels 99
Antenna jack SMA

Universal channels for discrete input/output

Channel operation modes discrete input (wet or dry contact), signal relay
Channel current consumption 3 mA
Built-in power supply voltage 12 V
Built-in power supply max current 200 mA


TOPAZ IEC DAS MX681 A [B]/[C]/[D]/[E]/[F1- to -Fx] ([G1- to -Gx]-[H1- to -Hx]) I
Position Code Description
Main device type
A ExxRyy Total number of device ports, where xx is the total number of Ethernet ports, and yy is the total number of serial ports
Additional functions
B GSM GSM modem for 2 mini-SIM cards
GSM-LTE GSM/LTE modem for 2 mini-SIM cards
GSM(SC) GSM modem with 2 built-in SIM-chips
GSM-LTE(SC) GSM/LTE modem with 2 built-in SIM-chips
С PTS Time signal receiver (GLONASS/GPS)
D DIOn Universal channels for discrete input/output, where n is the number of channels. Increment – 4.
E SSDm SSD drives, where m is the total ROM volume of SSD drives in gigabytes (terabytes)
Operator panel
F1- to -Fx nHDMI HDMI port
nUSB USB ports
nDB9 DB9 port
HMI7 TOPAZ HMI7 human-machine interface
HMI15 TOPAZ HMI15 touch screen
Ethernet communication ports
G1- to -Gx nGSFP Ethernet 1000 Mbit/s SFP
nGTXSFP Ethernet 1000 Mbit/s combo-port RJ-45/SFP
nGTx Ethernet 1000 Mbit/s TX RJ-45
nTx Ethernet 100 Mbit/s TX RJ-45
nFxS Ethernet 100 Mbit/s FX LC single-mode
nFxM Ethernet 100 Mbit/s FX LC multi-mode
n is the number of Ethernet ports of the respective type, maximum total number of Ethernet ports is 32.
Serial communication ports
H1- to -Hx nR RS-485 terminal input
nRS232 RS-232 terminal input
nRS422 RS-422 terminal input
nRS485Fo RS-485 optical ST connector
nRS232Fo RS-232 optical ST connector
n is the number of serial ports of the respective type, maximum total number of serial ports is 16.
Built-in power supply
I - Two power supply inputs 24 VDC
HV Built-in power supply unit 220V DC/AC
2HV Two independent power supply units 220V DC/AC

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