Analogue Input - 2-wire transmitters, 4-20mA conventional and
'smart' | Device | No. of channels | Output to hazardous area | Important features | DIN-rail mounting devices | MTL5541 | | 16.5V min. @ 20mA | Compatible with most smart transmitters | MTL5541A | 1 | 8.6V diode | 4 wire smart transmitters | MTL5541AS | 1 | 8.6V diode | 4 wire smart transmitters, current sink output | MTL5544 | 2 | 16.5V min @ 20mA | Compatible with most smart transmitters | MTL5544A | 2 | 8.6V diode | 4 wire smart transmitters | MTL5544AS | 2 | 8.6V diode | 4 wire smart transmitters, current sink output | MTL5544D | 1 | 16.5V min @ 20mA | Compatible with most smart transmitters, repeat output | MTL5544S | 2 | 16.5V min @ 20mA | Compatible with most smart transmitters, current sink output | Backplane mounting devices | MTL4541 | 1 | 16.5V min @ 20mA | Compatible with most smart transmitters | MTL4541A | 1 | 8.6V diode | 4 wire smart tranmitters | MTL4541AS | 1 | 8.6V diode | 4 wire smart transmitter, current sink output | MTL4541B | 1 | 16.5V min @ 20mA | As MTL4541 but adapted for MTL4041B substitution on legacy
backplanes | MTL4541P | 1 | 17.6V min @ 20mA | As MTL4541B but with a higher power output, MTL4041P substitution
on legacy backplanes | MTL4541S | 1 | 16.5V min @ 20mA | Suitable for conventional and smart transmitters, current sink
output | MTL4544 | 2 | 16.5V min @ 20mA | Compatible with most smart transmitters | MTL4544A | 2 | 8.6V diode | 4 wire smart transmitters | MTL4544AS | 2 | 8.6V diode | 4 wire smart transmitters, current sink output | MTL4544B | 1 | 16.5V min @ 20mA | As MTL4544 but adapted for MTL4044B substitution on legacy
backplanes | MTL4544D | 1 | 16.5V min @ 20mA | Compatible with most smart transmitters, repeat output | |
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Analogue Input - vibration transducer | Device | No. of channels | Signal monitored | Main features | DIN-rail mounting devices | | MTL5531 | 1 | Vibration transducer | Compatible with vibration and accelerometer transducers | MTL5533 | 2 | Vibration transducer | Compatible with vibration and accelerometer transducers | Backplane mounting devices | MTL4531 | 1 | Vibration transducer | Compatible with vibration and accelerometer transducers | MTL4533 | 2 | Vibration transducer | Compatible with vibration and accelerometer transducers | |
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Analogue - loop isolator | Device | No. of channels | Output to hazardous area | Main features | DIN-rail mounting devices | MTL5040 | 1 x AI + 1 x AO | 16.5V @ 20mA Vmax 11V @ 20mA | Analogue input and output module (To be discontinued) | |
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Analogue Input - thermocouple and mV sources | Device | No. of channels | Output to safe area | Main features | DIN-rail mounting devices | MTL5575 | 1 | 4/20mA | Configurable, built-in CJC, early burnout detection facility | MTL5576-THC | 2 | 4/20mA | Configurable, built-in CJC, also config as 1in 2 out | MTL5581 | 1 | 0 to ±50mV | Selectable upscale or downscale (available 2011Q4) | Backplane mounting devices | MTL4575 | 1 | 4/20mA | Configurable, built-in CJC, early burnout detection facility | MTL4576-THC | 2 | 4/20mA | Configurable, built-in CJC, also config as 1in 2 out | MTL4581 | 1 | 0 to ±50mV | Selectable upscale or downscale (available 2011Q4) | |
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Analogue Input - 2, 3 and 4-wire RTDs | Device | No. of channels | Output to safe area | Main features | DIN-rail mounting devices | MTL5575 | 1 | 4/20mA | Configurable | MTL5576-RTD | 2 | 4/20mA | Configurable, also config as 1in 2 out | MTL5582 | 1 | 10 to 400 ohm | Independent selection of 2, 3 or 4-wire RTDs on safe and hazardous
area sides | Backplane mounting devices | MTL4575 | 1 | 4/20mA | Configurable, many sensor types and ranges | MTL4576-RTD | 2 | 4/20mA | Configurable, also config as 1in 2 out | |
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Analogue Output - controller outputs, I/P converters | Device | No. of channels | Output to hazardous area | Important features | DIN-rail mounting devices | MTL5546 | | 1mA <Io<24mA Vmax = 16V | Suitable for HART valve positioners, SC & OC LFD | MTL5546Y | 1 | 1mA <Io<24mA Vmax = 16V | Suitable for HART valve positioners, OC LFD | MTL5549 | 2 | 1mA <Io<24mA Vmax = 16V | Suitable for HART valve positioners, SC & OC LFD | MTL5549Y | 2 | 1mA <Io<24mA Vmax = 16V | Suitable for HART valve positioners, OC LFD | Backplane mounting devices | MTL4546 | 1 | 1mA <Io<21.4mA Vmax = 16V | Suitable for HART valve positioners, SC & OC LFD | MTL4546Y | 1 | 1mA <Io<26mA Vmax = 16V | Suitable for HART valve positioners, OC LFD | MTL4549 | 2 | 1mA <Io<26mA Vmax = 16V | Suitable for HART valve positioners, SC & OC LFD | MTL4549Y | 2 | 1mA <Io<24mA Vmax = 16V | Suitable for HART valve positioners, OC LFD | |
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Digital Input - switches / proximity detectors | Device | No. of channels | Output to safe area | Important features | DIN-rail mounting devices | MTL5510 | 4 | 4 x solid state | Can switch +ve or –ve polarity signals | MTL5510B | 4 | 4 x solid state | Mult-function selectable | MTL5511 | 1 | 1 x SPDT | Switch/proximity detector repeater | MTL5513 | 2 | 2 x solid state | dc to 1kHz frequency response | MTL5514 | 1 | 1 x SPDT 1 x SPDT | Switch/proximity detector repeater Independent LFD output | MTL5516C | 2 | 2 x SPDT | Switch/proximity detector repeater | MTL5517 | 2 | 2 x SPDT 1 x SPDT | Switch/proximity detector repeater Independent LFD output | MTL5014 | 2 | 1 x SPDT 1 x SPDT | Switch/proximity detector repeater Phase reversal, selectable repeat output or LFD alarm | Backplane mounting devices | MTL4504 | 1 | 1 x SPDT 1 x SPDT | Switch/proximity detector repeater Independent LFD output, de-energise to alarm | MTL4510 | 4 | 4 x solid state | Can switch +ve or –ve polarity signals | MTL4510B | 4 | 4 x solid state | Mult-function selectable switches +ve, -ve or ac signals | MTL4511 | 1 | 1 x SPDT | Switch/proximity detector repeater | MTL4513 | 2 | 2 x solid state | dc to 1kHz frequency response switches +ve, -ve or ac signals | MTL4514 | 1 | 1 x SPDT 1 x SPDT | Switch/proximity detector repeater Independent LFD output, energise to alarm | MTL4516 | 2 | 2 x SPST | Switch/proximity detector repeater | MTL4516C | 2 | 2 x SPDT | Switch/proximity detector repeater | MTL4517 | 2 | 2 x SPST 1 x SPDT | Switch/proximity detector repeater Independent LFD output | |
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Digital Input - switch/proximity detectors, SIL3 | Device | No. of channels | Signals monitored | Important features | DIN-rail mounting devices | MTL5501-SR | 1 | 24V logic | Safety related, SIL3 certified | Backplane mounting devices | MTL4501-SR | 1 | 24V logic | Safety related, SIL3 certified | |
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Digital Output - alarms, LEDs, solenoid valves, etc | Device | No. of channels | Output to hazardous area | Important features | DIN-rail mounting devices | MTL5521 | 1 | 12.8V<Vo<24V Imax = 48mA | IIC gas groups, loop powered | MTL5522 | 1 | 9.9V<Vo<21.4V Imax = 70mA | IIB gas groups, loop powered | MTL5523 | 1 | 12.8V<Vo<24V Imax = 48mA | Switch controlled input, Independent LFD output | MTL5523V | 1 | 12.8V<Vo<24V Imax = 48mA | Voltage controlled input, Independent LFD output | MTL5524 | 1 | 12.8V<Vo<24V Imax = 48mA | Safety override feature, separately powered | MTL5525 | 1 | 7V<Vo<24V Imax = 48mA | Safety override, low power output | Backplane mounting devices | MTL4521 | 1 | 12.8V<Vo<24V Imax = 48mA | Loop powered | MTL4521L | 1 | 10.3V<Vo<24V Imax = 48mA | Loop powered | MTL4523 MTL4523R | 1 | 12.8V<Vo<24V Imax = 48mA | Switch controlled input, Independent LFD output | MTL4523L | 1 | 12.8V<Vo<24V Imax = 48mA | Loop powered, independent LFD output | MTL4523V | 1 | 12.8V<Vo<24V Imax = 48mA | Voltage controlled input, Independent LFD output | MTL4524 & MTL4524S | 1 | 12.8V<Vo<24V Imax = 48mA | Safety override feature, separately powered | MTL4525 | 1 | 7V<Vo<24V Imax = 48mA | Safety override, low power output | |
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Digital Output - switch output to hazardous area | Device | No. of channels | Signals monitored | Important features | DIN rail mounting devices | | MTL5526 | 1 or 2 | 2 x DPDT | Safe-area switch input or loop powered. 2ch or 1ch with 2 outputs | Backplane mounting devices | MTL4526 | 1 or 2 | 2 x DPDT | Safe-area switch input or loop powered. 2ch or 1ch with 2 outputs | |
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Pulse Input - turbine / flowmeters | Device | No. of channels | Input from hazardous area | Important features | DIN-rail mounting devices | MTL5532 | 1 | Switch, proximity detector, current pulse, voltage pulse | Voltage and current inputs from 2 or 3-wire transmitters configurable 4-20mA analogue output | MTL5541 | 1 | 2-wire pulse | e.g. 2-wire turbine and vortex flowmeters | Backplane mounting devices | MTL4513 | 2 | Switch, proximity detector | e.g. 2-wire positive displacement flowmeters | MTL4532 | 1 | 1mA <Io<21.4mA Vmax = 16V | Voltage and current inputs from 2 or 3-wire transmitters configurable 4-20mA analogue output | MTL4541 | 1 | 2-wire pulse | e.g. 2-wire turbine and vortex flowmeters | |
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Fire / Smoke detectors | Device | No. of channels | Output to hazardous area | Important features | DIN-rail mounting devices | MTL5561 | 2 | Loop powered | 0–40mA, fire and smoke detectors | Backplane mounting devices | MTL4561 | 2 | Loop powered | 0–40mA, fire and smoke detector | |
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Signal transfer - safe area to safe area - via hazardous area | Device pair | No. of channels | Signal transferred | Important features | DIN-rail mounting devices | MTL5546Y & MTL5541A | 1 | 4/20mA smart | Driver Receiver | MTL5526 & MTL5516C | 2 | Status signals | Driver Receiver | MTL5051 | 1 | RS232 or RS422 | Either can be used as receiver or driver | Backplane mounting devices | MTL4546Y & MTL4541A | 1 | 4/20mA smart | Driver Receiver | MTL4526 & MTL4516 | 2 | Status signals | Driver Receiver | |
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Trip amplifiers | Device | No. of channels | Signals monitored | Important features | DIN-rail mounting devices | MTL5314 | 1 | 4/20mA | Configurable, one or two alarms | |
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Earth-leakage detector | Device | No. of channels | Output to safe area | Important features | Backplane mounting devices | MTL4220 | 8 | 1 x SPST | Can monitor up to 8 loops, use BPS04 or 08 backplane |
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