MTL5541 output measurement module

Description

MTL5541 output measurement module

MTL5541 output measurement module

The MTL5541 provides a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter which is located in a hazardous area, and repeats the current in another floating circuit to drive a safe-area load. For HART 2-wire transmitters, the unit allows bidirectional communications signals superimposed on the 4/20mA loop current. Alternatively, the MTL5541S acts as a current sink for a safe-area connection rather than driving a current into the load. Separately powered current sources, such as 4-wire transmitters, can be connected but will not support HART communication.

Single channel, for 4/20mA, HART® for 2- or 3-wire transmitters

The MTL5541A provides an input for separately powered 4/20mA transmitters and also allows bi–directional transmission of HART communication signals superimposed on the 4/20mA loop current. Alternatively, the MTL5541AS acts as a current sink for a safe-area connection rather than driving a current into the load.

Note: Do not connect a voltmeter in circuit to measure V1 until requested in Step 4 below, because current measurement A2 could be affected. Set A2 range to

1. Adjust RV1 to vary the current (A1) through the range 4 to 20mA.

2. The measured current imbalance (A2) over this range for the MTL5541S and the MTL5544S should not exceed ± 20mA. For the MTL5561 the imbalance should not exceed ± 400mA.

3. Adjust RV1 for a 20mA reading on A1

4. The voltage V1, across the channel input, should typically be >16.5V.

MTL5501-SR 1 fail-safe, solid-state output + LFD alarm
MTL5510 4 switch/prox input, solid-state output
MTL5510B 4 multi-function, switch/prox input, solid-state output
MTL5511 1 switch/prox input, c/o relay output
MTL5513 2 switch/prox input, solid-state output
MTL5514 1 switch/prox input, relay + LFD
MTL5514D 1 switch/prox input, dual relay output
MTL5516C 2 switch/prox input, relay + LFD outputs
MTL5517 2 switch/prox input, c/o relay + LFD outputs
Digital Output
MTL5521 1 loop-powered solenoid driver
MTL5522 1 loop-powered solenoid driver, IIB
MTL5523 1 solenoid driver with LFD
MTL5523V 1 solenoid driver with LFD + voltage control, IIC
MTL5523VL 1 solenoid driver with LFD + voltage control, IIC
MTL5524 1 switch operated solenoid driver
MTL5525 1 switch operated solenoid driver, low power
MTL5526 2 switch operated relay
Pulse & Vibration Output
MTL5531 1 vibration probe interface
MTL5532 1 pulse isolator, digital or analogue output
MTL5533 2 vibration probe interface
Analogue Input
MTL5541 1 2/3 wire transmitter repeater
MTL5541A 1 transmitter repeater, passive input
MTL5541AS 1 transmitter repeater, passive input, current sink
MTL5541S 1 2/3 wire transmitter repeater, current sink
MTL5544 2 2/3 wire transmitter repeater
MTL5544A 2 transmitter repeater, passive input
MTL5544AS 2 transmitter repeater, passive input, current sink
MTL5544S 2 2/3 wire transmitter repeater, current sink
MTL5544D 1 2/3 wire transmitter repeater, dual output
Analogue Output
MTL5546 1 4-20mA smart isolating driver + LFD
MTL5546Y 1 4-20mA smart isolating driver + oc LFD
MTL5549 2 4-20mA smart isolating driver + LFD
MTL5549Y 2 4-20mA smart isolating driver + oc LFD
Fire and Smoke
MTL5561 2 loop-powered for fire & smoke detectors
Temperature Input
MTL5573 1 temperature converter, THC or RTD
MTL5575 1 temperature converter, THC or RTD
MTL5576-RTD 2 temperature converter, RTD
MTL5576-THC 2 temperature converter, THC
MTL5581 1 mV/thermocouple isolator for low level signals
MTL5582 1 mV/resistance isolator to repeat RTD signals
General
MTL5599 1 dummy module