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| Type 421 Failsafe Compact Electronic Converter
Current to Pressure (I/P) Manifold or Rail Mount Features The 421 proportional I/P converter uses advanced electronic control to achieve outstanding performance. It is highly reliable with long life, is free from the effects of vibration and its high density mounting capability makes it ideal for control room applications,
The manifold system, usually surface mounted, allows several converters to be connected to a single air supply and is available in different lengths. |
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Advanced electronic control
| Pneumatic | ||
| *Output Signal | *0.2-1bar (3-15psig); minimum outlet pressure less than 15mbar (0.2psig) | |
| *Air Supply | Oil free, dry air, filtered to 5 microns; 1.5-3.5bar (20-50psig) or at least 0.7bar above maximum output pressure | |
| *Flow Capacity | Up to 150Nl/min (5scfm) | |
| *Air Consumption | 0.2 l/min typical low pressure (0.007scfm) | |
| *Response Time | 5 seconds (10 to 90% or 90 to 10% of output pressure into a 5 litre load | |
| *Total Error | +/-0.25% of span (typical, independent error includes the combined effect of non-linearity, hysteresis, deadzone and repeatability | |
| *Temperature Effect | Typically less than 1% span for span and zero between 0°C and 50°C | |
| *Supply Sensistivity | Maximum of +/-2% of outlet pressure at extremes of supply range | |
| *Connections | 1/8" NPT female | |
| Physical | ||
| *Operating Temperature | -10°C to +60°C | |
| *IP Rating | IP40 | |
| *Vibration | The unit possesses a high degree of immunity | |
| *Electromagnetic Compatibility | Compliant and CE marked in accordance with the EC E.M.C. directive. Tested to standards: BS EN50082-2: 1995, BS EN50081-2: 1994 | |
| *Material of Construction | Anodised natural aluminium | |
| *Mass | 600g | |
| *Mounting Position | The instrument can be mounted in any orientation. A rail clip is provided with each instrument for TS32 (EN50035)/TS35 (EN50022) rail | |
| Electrical | ||
| *Electrical Signal | 4-20mA (two wire); load presents 10 volts (+/-0.5V) constant voltage drop to the current source | |
| *Failure Mode | Signal falls to below 15mbar (0.2psig) when input signal fails | |
| *Connections | Two part quick release terminal block with capacity up to 2.5mm2 cable | |
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| Manifold | ||
| *Materials | Aluminium extrusion, clear anodised, nitrile 'O' ring seals | |
| *Port Sizes | Supply and output 1/4" NPT | |
| *Proof Pressure | 10bar (150psig); pressure should be regulated to converter requirements. WARNING: maximum pressure should not be exceeded for safety reasons. | |
| Note: It is recommended that an appropriate filter-regulator be fitted to supply all converters | ||
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| Ordering Information | |||
| 421 |
Output Pressure |
Order Code |
Options to specific
order:
Alternative pressure
ranges |
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0.2-1bar |
53AB2100 |
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| 3-15psig |
53AB0100 |
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| Manifold |
Number of Ports |
Order Code |
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5 |
53AA005X |
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| 10 |
53AA002X |
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| 15 |
53AA003X |
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| 20 |
53AA004X |
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| Adapter kit (1 required per converter) |
53AA000X |
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| Certification |
| All instruments are tested on the Watson Smith Automatic Testing System and an individual test certificate is provided at no extra charge. Each unit is tested for linearity, hysteresis, total error, settling error, over pressure, air consumption, response time, calibration, insulation, start-up current, supply sensitivity and voltage load.
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Electronic I/P Converters |
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