Human-Machine Interfaces - Individual Solutions

Product Description

A Human-Machine Interface (HMI) is a computer which handles the communication between machines and humans. Thus it deals with any aspects that have an impact on a user's interaction with that system. A machine can be anything from a wristwatch to a large factory. The communication can be the human pushing a button or the machine flashing a lamp.
MEN designs and manufactures the hardware-control electronics, peripheral devices such as printer, touch etc. and housings for Human-Machine Interfaces for a range of applications in the automation industry. Because of the variety of different individual requirements these designs are always full custom solutions.

The HMI design example described here is based on an aluminum front panel covered with a printed plastic film. It houses an 800 x 600 pixel TFT with integrated keyboard (touch input). Located at the front and protected against dust by a cover, a fast printer, an RS232 debug/service connection and optionally a CAN interface are available. The rear side of the HMI provides further interfaces, such as one or two Fast Ethernet lines, another CAN interface, another two to four COMs and the 24V supply.
The electronics inside the HMI consists of two main components: An ESM - Embedded System Module (a complete computer on a single board) and a carrier board for the remaining functions like physical interfaces for the field busses etc. and the power supply. All permanent connections are done at the rear of the system.
The electronics of the HMI is based on a powerful, low-dissipation PowerPC MPC 8245 processor. For scalable memory configuration it provides an SO-DIMM socket for data and a CompactFlash slot for program storage. I/O functionality can also be scaled: it comprises various COMs, Ethernet, CAN etc. -- with CAN, several UARTs and graphics implemented in an FPGA. Additional I/O functionality can be realized in a very flexible and cost-effective way by extending the FPGA.
The standard operation temperature for the whole system is 0 to 60°C.
The HMI runs Embedded Linux or real-time operating systems. The Java implementation allows both local operation and access via any type of network, i.e. also the Internet.
Similar HMI configurations are also possible based on a PC core (x86) running Windows®. Independent of the processor core, all HMIs can be delivered in a once defined configuration for a minimum of 5 years.
　

Technical Data

Mechanical Specifications

Aluminum enclosure
　

Dimensions: depth 75 mm (max.), width 483 mm, height 288 mm
　

IP rating: IP20 according to EN 60529
　

CPU

PowerPC Kahlua II, 266..400MHz
　

Memory

32..512MB SO-DIMM / 133MHz
　

Two CompactFlash slots
• One located at the front, dust protection cover
• One inside the system, for program data
　

Graphics

32MHz video frequency
　

16MB video SDRAM
　

16 bits/pixel (5-5-6)
　

Linearly organized frame buffer interface
　

TFT

Hitachi TX31D30VC1CAA
　

800 x 600 pixels, 6 bits/color
　

300 cd/m²
　

TTL interface
　

Touch panel

Analog resistive touch panel
　

Printer

Fast thermal printer, e.g. Seiko LP1245
　

Printing speed > 15mm/s
　

Paper feed speed > 30mm/s
　

Push button for form feed
　

Interfaces

Serial Connection
• RS232/RS422/RS485 selectable through software setup
• Isolated
• Standard baud rates up to 115.2 kbaud
• Two handshake lines in RS232 mode
　

Ethernet
• 10/100Mbits/s Ethernet interface
• One or two channels
• RJ45 connectors at rear side
　

CAN bus
• ISO high speed
• Optically isolated
• Baud rate up to 1Mbit/s
　

Debug/Service Connection
• RS232
• Standard connector at front
　

Further I/O options through FPGA

All functions optional, can be factory-programmed as needed
　

IDE interface
　

SRAM controller
　

Quad UART
　

GPIO
　

PCI bus Extension Interface

PCI-104 extension slot
　

Miscellaneous Features

SA adapter extension interface
• For flexible serial interfacing
• Connection at rear side
　

Power Supply

24V +/-25%, 0,8A typical, 2A max.
　

3.15t fuse
　

Environmental Specifications

Temperature range (operation):
• 0..+50°C
• Airflow: min. 10m³/h
　

Temperature range (storage): -20..+60°C
　

Relative humidity (operation): max. 85% non-condensing
　

Relative humidity (storage): max. 85% non-condensing
　

Altitude: -300m to + 3,000m
　

Shock: 6g/6ms
　

Crash: 15g/0.33ms
　

Vibration (sinusoidal): 1g/5..2000Hz
　

Safety

PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
　

EMC

Tested according to EN 55022 (radio disturbance), IEC1000-4-2 (ESD) and IEC1000-4-4 (burst) with regard to CE conformity
　

Software Support

Embedded Linux
　

VxWorks
　

OS-9
　

Diagram