M77 - Quad RS232/RS422/RS485 UART

All 4 channels electrically isolated from the system and from each other

UART Controller

4 independent full-duplex asynchronous 16C950 high performance UART channels each

128-byte FIFO for each transmitter and receiver

UARTs fully software compatible with industry standard 16C55x type UARTs

Data rates up to 115.2kbit/s

Readable FIFO levels

Automated in-band flow control using programmable Xon/Xoff characters, in both directions

Automated out-of-band flow control using CTS/RTS and/or DSR/DTR

Arbitrary trigger levels for receiver and transmitter FIFO interrupts

Programmable special character detection

5-, 6-, 7-, 8- and 9-bits data framing

Detection of bad data in receiver FIFO

Independent channel reset by software

Transmitter and receiver can be disabled

Transmitter idle interrupt

Sleep mode (low operating current)

Peripheral Connections

Via front panel on a shielded 25-pin D-Sub receptacle connector

Via carrier board (rear I/O)

M-Module™ Characteristics

Compliant with M-Module™ standard

A08, D08, INTA, IDENT

Electrical Specifications

Isolation voltage:
• 500V DC between isolated side and digital side
• 180V DC between the channels
• Voltage between the connector shield and isolated ground is limited to 180V using a varistor; AC coupling between connector shield and isolated ground through 47nF capacitor

Supply voltage/power consumption: +5V (4.85V..5.25V), 200mA typ.

MTBF: 272,598h @ 40°C according to IEC/TR 62380 (RDF 2000)

Mechanical Specifications

Dimensions: conforming to M-Module™ Standard

Weight: 67g

Environmental Specifications

Temperature range (operation):
• 0..+60°C or -40..+85°C
• Airflow: min. 10m³/h

Temperature range (storage): -40..+85°C

Relative humidity range (operation): max. 95% non-condensing

Relative humidity range (storage): max. 95% non-condensing

Altitude: -300m to + 3,000m

Shock: 15g/11ms

Bump: 10g/16ms

Vibration (sinusoidal): 2g/10..150Hz

Conformal coating on request

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)

Software Support

Linux driver

Windows® driver

VxWorks® driver

QNX® driver

OS-9® SPF driver

For more information on supported operating system versions and drivers see Software.

Article No.	Description	More
04M077-00	4-channels RS232/RS485/RS422, optically isolated UART, 0..+60°C	Photo
04M077-01	4-channel RS232/RS485/RS422, optically isolated UART, -40..+85°C screened

Article No.	Description	More
05M000-00	M-Module™ cable, 2m, with 25-pin D-Sub plug/housing to pig tail	Photo
05M000-17	25 mounting screw sets to fix M-Modules™ on carrier boards	Photo

Article No.	Description	More
Linux
This product is designed to work under Linux. See below for potentially available separate software packages from MEN.
13M077-90	Linux TTY driver (MEN) for M77, M45N and M69N, source code	Download Details
Windows
This product is designed to work under Windows®. See below for potentially available separate software packages from MEN.
13M077-70	Windows® native driver (MEN) for M77, M45N and M69N	Download Details
VxWorks
This product is designed to work under VxWorks®. For details regarding supported/unsupported board functions please refer to the corresponding software data sheets.
13M077-60	VxWorks® driver (MEN) for M77, M45N and M69N, source code	Download Details
QNX
This product is designed to work under QNX®. For details regarding supported/unsupported board functions please refer to the corresponding software data sheets.
13M077-40	QNX® native driver (MEN) for M77, M45N and M69N	Download Details
OS-9
This product is designed to work under OS-9®. For details regarding supported/unsupported board functions please refer to the corresponding software data sheets.
13M077-01	OS-9®/68k SCF driver for M77	Download Details
13M077-02	OS-9®/PPC SCF driver for (MEN) M77, M45N and M69N, source code	Download Details

For operating systems not mentioned here contact MEN sales.

Article No.	Description	More
04M077-DS	M77 Data Sheet (PDF)	Download
20M000-00	M-Module™ Draft Specification, Rev. 3.0 (PDF)	Download
20M077-ER	M77 Errata (PDF)	Download
20M077-00	M77 User Manual (PDF)	Download