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MTL4700系列安全栅
- The MTL4700 Series of safety barriers are multi-channel devices designed for close integration of intrinsic safety into process systems. Combining the compact ‘plug-in’ design concept of the MTL4000 Series of isolators with the circuit d
The MTL4700 Series of safety barriers are multi-channel devices designed for close integration of intrinsic safety into process systems. Combining the compact ‘plug-in’ design concept of the MTL4000 Series of isolators with the circuit designs of the well-known MTL700 Series of barriers, the new barriers provide exceptionally high packing densities allied to proven reliability – so reducing space requirements and weight loading without sacrificing performance.
Multi-channel modules save space
Backplane mounting simplifies cabling
Standard & custom backplanes
High integrity earth connections
Removable hazardous area connector
Products in this range do not conform to ATEX Directive 94/9/EC and have been discontinued.
Multi-channel modules save space
Backplane mounting simplifies cabling
Standard & custom backplanes
High integrity earth connections
Removable hazardous area connector
Products in this range do not conform to ATEX Directive 94/9/EC and have been discontinued.
| Product Code | Description | Downloads |
|---|---|---|
 Symbol denotes that the equipment is suitable for use in hazardous area applications. Symbol denotes that the product has been assessed for functional safety applications |
||
| MTL4700 | MTL4700 Series Common Specification | Datasheet |
| MTL4706+ | 2ch - 2-wire 4/20mA & smart Tx | Datasheet |
| MTL4715+ | 4ch - 12V DC applications | Datasheet |
| MTL4722+ | 4ch - 18V DC applications | Datasheet |
| MTL4728– | 4ch - negative & floating supplies | Datasheet |
| MTL4728+ | 4ch - digital or 4/20mA outputs | Datasheet |
| MTL4755ac | 3ch - 3-wire RTD applications | Datasheet |
| MTL4760ac | 2x2ch - two thermocouples/AC sensors/4-wire RTD | Datasheet |
| MTL4763Pac | 3x2ch - strain-gauge bridges | Datasheet |
| MTL4778ac | 2x2ch - 2-wire DC & AC systems | Datasheet |
| MTL4781+ | 4ch+1 - 4 switches + 1 supply | Datasheet |
| MTL4787+ | 2x2ch - multi-purpose inputs/outputs | Datasheet |
| MTL4787P+ | 2x2ch - hi-power multi-purpose inputs/outputs | Datasheet |
| MTL4788+ | 2x2ch - 4/20mA Tx | Datasheet |
| MTL4788R+ | 2x2ch - 4/20mA Tx + voltage output | Datasheet |
| MTL4796– | 2x2ch - vibration probes | Datasheet |
| MTL4799 | Dummy barrier | Datasheet |
Ambient temperature
–20 to +60°C (continuous working)
–40 to +80°C (storage)
Humidity
5 to 95% RH
Leakage current
For ‘basic’ barriers with a working voltage of 5V or more, the
leakage current decreases by at least one decade/volt reduction
in applied voltage below the working voltage over two decades.
For the MTL4755ac it decreases by at least one decade for a 0.4V
reduction in applied voltage.
Safe-area terminations
Through 11-way base connector onto backplane.
Pins 7, 12 and 17 are earth connections for all modules and are
tracked on all backplanes to the heavy-duty earth terminal.
Pins 15 and 16 on bussed-power modules pick up power from
bussed-power backplanes.
Pins 15 and 16 on modules which cannot pick up bussed power
are not linked internally.
Hazardous-area terminations
By separate 6-way connector into the barrier top
Colour coding (barrier top label)
Grey: non-polarised
Red: positive polarity
Black: negative polarity
White: dummy barrier
Weight
175g approximately (each module)
–20 to +60°C (continuous working)
–40 to +80°C (storage)
Humidity
5 to 95% RH
Leakage current
For ‘basic’ barriers with a working voltage of 5V or more, the
leakage current decreases by at least one decade/volt reduction
in applied voltage below the working voltage over two decades.
For the MTL4755ac it decreases by at least one decade for a 0.4V
reduction in applied voltage.
Safe-area terminations
Through 11-way base connector onto backplane.
Pins 7, 12 and 17 are earth connections for all modules and are
tracked on all backplanes to the heavy-duty earth terminal.
Pins 15 and 16 on bussed-power modules pick up power from
bussed-power backplanes.
Pins 15 and 16 on modules which cannot pick up bussed power
are not linked internally.
Hazardous-area terminations
By separate 6-way connector into the barrier top
Colour coding (barrier top label)
Grey: non-polarised
Red: positive polarity
Black: negative polarity
White: dummy barrier
Weight
175g approximately (each module)
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