MTL5051 Serial Data Communications Isolator IN STOCK

 

 

The MTL5051 provides bi-directional serial data communication from

a computer system in safe area to instrumentation in a hazardous

area. It is used to provide a fully floating dc supply for, and serial

data communications to: MTL643, MTL644, MTL646 and MTL647 IS

text displays, other IS instrumentation, keyboards or a mouse. It can

also be used for data communications across a hazardous area.

 

SPECIFICATION

See also common specification

Location of field equipment

Zone 0, IIC, T4-6 hazardous area

Div 1, Group A hazardous location

Safe-area signal

RS232 or RS422

Hazardous-area signal

MTL640 Series mode:

To hazardous area: 3V signal superimposed on 12V

(nominal) supply

From hazardous area: 5mA signal superimposed on

quiescent current

Across hazardous area communications mode:

To hazardous area: 10mA current source

From hazardous area: 10mA current source

IS RS232/TTL devices mode:

To hazardous area: RS232-compatible signal levels

From hazardous area: TTL/RS232 signals

LED Indicators

Green: power indication

Max. power dissipation within unit

1.7W at 24V, 25mA load

Maximum power consumption (25mA load)

At Vs=20V, 105mA

At Vs=24V, 90mA

At Vs=35V, 70mA

Comms bandwidth

643/4 mode 1200 to 9600 baud

Other modes up to 19.2 kbaud

Safety description

Terminals 1,2,3,4 only 14V, 800mW, 192mA

Terminals 1,3,4 only 14V, 350mW, 88mA

Terminals 1,2,3 only 14V, 450mW, 108mA

Terminals 1,5,6 only 15V, 70mW, 35mA

Terminals 1,2,5,6 only 20V, 460mW, 139mA

Terminals 1,2,3,4,5,6 only 20V, 810mW, 227mA

Hazardous area supply terminal 2

+12V mode 12.0V ± 5% (load <23mA)

+12V mode 8.0V min (load >23 to <50mA)

+5V 5.6V ± 5% (load >23 to <50mA)

Hazardous Interfacing

See MTL640 Series for details of interfacing with MTL643,

MTL644, MTL646 and MTL647 IS text displays.

Across hazardous areas communications mode

The MTL5051 is used in pairs to transfer bi-directional fullduplex

data across hazardous areas, as shown above. Current

switching is used to minimise the bandwidth-limiting effects of

long cables.

Interfacing to an IS keyboard, mouse or other device

Communicating with RS232-level interfaces, such as an IS

keyboard, mouse, etc. is achieved by using one or more

MTL5051 units as required by the device. (TTL level interfaces are

also accommodated by the TTL-compatibility feature of RS232

receivers.) The supply to the IS equipment may be selected to be

either 5V or 12V by switch on top of unit.



Model Number: