MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051

MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051

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.

MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051
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

MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051
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

MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051
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

MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051
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.

MTL5051 SERIAL-DATA COMMS ISOLATOR MTL5051
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.

MTL5501-SR  FAIL-SAFE SWITCH/PROXIMITY DETECTOR INTERFACE WITH LFD
MTL5510 SWITCH/ PROXIMITY DETECTOR INTERFACE 4-CHANNEL, DIGITAL INPUT
MTL5510B SWITCH/ PROXIMITY DETECTOR INTERFACE 4-CHANNEL, MULTI-FUNCTION, DIGITAL INPUT
MTL5511 SWITCH/ PROXIMITY DETECTOR INTERFACE 1-CHANNEL, WITH LINE FAULT DETECTION
MTL5513  SWITCH/ PROXIMITY DETECTOR INTERFACE 2-CHANNEL, LINE FAULT DETECTION, PHASE REVERSAL
MTL5514  SWITCH/ PROXIMITY DETECTOR INTERFACE 1-CHANNEL, LINE FAULT DETECTION, PHASE REVERSAL
MTL5514D  SWITCH/ PROXIMITY DETECTOR INTERFACE 1-CHANNEL, DUAL OUTPUT, LFD, PHASE REVERSAL
MTL5516C SWITCH/ PROXIMITY DETECTOR INTERFACE 2-CHANNEL, WITH LINE FAULT DETECTION
MTL5517 SWITCH/ PROXIMITY DETECTOR INTERFACE 2-CHANNEL, LINE FAULT DETECTION, PHASE REVERSAL
MTL5521 SOLENOID/ ALARM DRIVER LOOP-POWERED, IIC
MTL5522  SOLENOID/ALARM DRIVER LOOP-POWERED, IIB
MTL5523 SOLENOID/ALARM DRIVER WITH LINE FAULT DETECTION, IIC
MTL5523V - VL  SOLENOID/ALARM DRIVER WITH LINE FAULT DETECTION, IIC
MTL5524  SOLENOID/ALARM DRIVER SWITCH OPERATED WITH OVERRIDE, IIC
MTL5525 SOLENOID/ALARM DRIVER SWITCH OPERATED WITH OVERRIDE, IIC, LOW POWER
MTL5526 SWITCH-OPERATED RELAY 2–CHANNEL IS–OUTPUT
MTL5541 REPEATER POWER SUPPLY 4/20MA, HART, 2- OR 3-WIRE TRANSMITTERS
MTL5541A  CURRENT REPEATER 4/20MA PASSIVE I/P FOR HART TRANSMITTERS
MTL5541AS CURRENT REPEATER 4/20MA PASSIVE I/P FOR HART TRANSMITTERS
MTL5541S REPEATER POWER SUPPLY 4/20MA, HART, 2- OR 3-WIRE TRANSMITTERS
MTL5544  REPEATER POWER SUPPLY 2-CHANNEL, 4/20MA, HART, 2- OR 3- WIRE TRANSMITTERS
MTL5544A  CURRENT REPEATER 4/20MA PASSIVE I/P FOR HART TRANSMITTERS
MTL5544AS  CURRENT REPEATER 4/20MA PASSIVE I/P FOR HART TRANSMITTERS
MTL5544D REPEATER POWER SUPPLY SINGLE CHANNEL, 4/20MA, HART FOR 2- OR 3-WIRE TRANSMITTERS, TWO OUTPUTS
MTL5544S REPEATER POWER SUPPLY 2-CHANNEL, 4/20MA, HART, 2- OR 3- WIRE TRANSMITTERS
MTL5546 ISOLATING DRIVER FOR 4–20MA HART VALVE POSITIONERS WITH LINE FAULT DETECTION
MTL5546Y  ISOLATING DRIVER FOR 4–20MA HART VALVE POSITIONERS WITH LINE FAULT DETECTION
MTL5549 ISOLATING DRIVER TWO-CHANNEL, FOR 4–20MA, HART VALVE POSITIONERS WITH LINE FAULT DETECTION
MTL5549Y ISOLATING DRIVER TWO-CHANNEL, FOR 4–20MA, HART VALVE POSITIONERS WITH LINE FAULT DETECTION
MTL5575 TEMPERATURE CONVERTER THC OR RTD INPUT + ALARM
MTL5576-RTD TEMPERATURE CONVERTER RTD/POTENTIOMETER INPUT, 2-CHANNEL
MTL5576-THC TEMPERATURE CONVERTER MV/THC INPUT, 2-CHANNEL
MTL5581 MILLIVOLT/THERMOCOUPLE ISOLATOR FOR LOW-LEVEL SIGNALS
MTL5582 RESISTANCE ISOLATOR TO REPEAT RTD SIGNALS
MTL5531  VIBRATION TRANSDUCER INTERFACE
MTL5532  PULSE ISOLATOR PULSE & 4/20MA CURRENT OUTPUTS
MTL5533 VIBRATION TRANSDUCER INTERFACE 2-CHANNEL
MTL5561  FIRE AND SMOKE DETECTOR INTERFACE 2-CHANNEL
MPA5500  A.C. POWER ADAPTOR
MTL5599 DUMMY ISOLATOR
MTL5991 24V DC POWER SUPPLY