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Table of Contents
Summary of Contents for Milltronics MFA-4P
- Page 1 MFA-4P MOTION FAILURE ALARM Instruction Manual October 2001...
- Page 2 Contact SMPI Technical Publications at the following address: Technical Publications Siemens Milltronics Process Instruments Inc. 1954 Technology Drive, P.O. Box 4225 Peterborough, Ontario, Canada, K9J 7B1 Email: techpubs@milltronics.com For the library of SMPI instruction manuals, visit our Web site: www.milltronics.com © Siemens Milltronics Process Instruments Inc. 2001...
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Page 3: Table Of Contents
............................................MFA-4P Main Amp Wiring for Automatic Start Delay..............13 Schematic Diagram - Remote Mounted / Pre-amplifier............. 14 Schematic Diagram MFA-4 Main Amplifier................... 15 Operating Principles Operating Principles........ Operating Principles Operating Principles ........ - Page 4 ..............................................................35 35 35 35 ......Index........ Index ....................................................37 37 37 37 Index Index ..........................................................PL-298 MFA-4p Page 4...
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Page 5: Specifications
4 lb (1.8 kg) MSP-1 -60 to 180°F (-50 to 80°C) 1 lb (0.5 kg) MSP-3 -60 to 500°F (-50 to 260°C) 3 lb (1.4 kg) MSP-9 -60 to 500°F (-50 to 260°C) 4 lb (1.8 kg) PL-298 MFA-4p Page 5... - Page 6 PL-298 MFA-4p Page 6...
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Page 7: Installation
: Installation and wiring must be in accordance with all governing regulations. Where possible, use flexible conduit. The probe components should be interconnected via flexible conduit. This allows for easier removal or adjustment of the probe and mounting flange assembly. PL-298 MFA-4p Page 7... -
Page 8: Dimensions
131mm 82mm (.0.25") (0.59") (5.138") (3.225") 240mm (9.455") 228mm (8.975") Enclosure Lid Screws NEMA 4 polycarbonate Mounting Holes 4.3mm/0.170" dia. 4 places Suitable location for Conduit Entrance Note: Use punch to make holes in the enclosure. PL-298 MFA-4p Page 8... -
Page 9: Mfa-4P Open Style
MFA-4p Open Style Main circuit board 221mm (8.688") 202mm (7.935") 139mm 149mm (5.453") (5.875") 71 mm (2.8”) 9 mm (0.375") 6 – 32 thread PL-298 MFA-4p Page 9... -
Page 10: Layout
Layout Main Amplifier PL-298 MFA-4p Page 10... -
Page 11: Interconnection
Main Amplifier Wiring. Shielded cable not required. Wire must be done in conjunction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations. See table below for lengths from probe at main amp. PL-298 MFA-4p Page 11... -
Page 12: Xpp-5
Wire gauge Wire gauge Length in feet Length in feet Length in metres Length in metres Wire gauge Wire gauge Length in feet Length in feet Length in metres Length in metres 2500 5000 1520 25000 7600 PL-298 MFA-4p Page 12... -
Page 13: Wiring
Interlocks and Safety Pull Switches are not shown. If START is initiated by programmable logic controller, closure time may be too brief to allow MFA-4p contact to latch. In this case, program a timer contact into the circuit. CSA requires a 10A, or less, fuse to protect contacts. For 240V AC, protect the contacts with a 1500 VA transformer as well. -
Page 14: Schematic Diagram - Remote Mounted / Pre-Amplifier
Schematic Diagram - Remote Mounted / Pre-amplifier PL-298 MFA-4p Page 14... -
Page 15: Schematic Diagram Mfa-4 Main Amplifier
Schematic Diagram MFA-4 Main Amplifier PL-298 MFA-4p Page 15... - Page 16 PL-298 MFA-4p Page 16...
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Page 17: Operating Principles
Operating Principles MFA-4p The MFA-4p Motion Failure Alarm detects an increase or decrease in the speed of rotating, reciprocating, or conveying equipment. It consists of a probe, pre-amplifier (remote or internal to probe), and main amplifier. Pulses generated from the probe are continually compared to the adjustable setpoint. If the pulse rate is lower than the setpoint, the alarm relay operating in a faiI-safe mode will de-energize, indicating failure. -
Page 18: Pre-Amplifier (Ima And Rma)
An increase in block size beyond 2" X 2" X 1" (50x50x25mm) is generally not as effective as minimizing the gap, except at very low velocities. The Milltronics Mini Sensing Probe, MSP-1, is approximately ¼ of the size of the standard probe with about the sensitivity. -
Page 19: Calibration
The relay status is indicated by Relay LED 2, which is illuminated when the relay is energized (normal). The MFA-4p has a 0 to 60 second time delay feature, allowing the monitored device to accelerate to normal running speed before monitoring begins. This feature is activated when power is applied to the MFA-4p in parallel with the motor starter contactor coiI. -
Page 20: Overspeed
Remember: If N.O. contacts were shorted as described in final note of calibration preamble, remove them now as calibration is complete. PL-298 MFA-4p Page 20... -
Page 21: Signal Generator Interface
Signal Generator Interface The following circuit may be used for calibrating or for troubleshooting of the MFA-4p. 470 to 620 ohm 2N4401 10K ohm to MFA-4p ¼ W Signal Generator Circuit substitutes operating probe and pre-amp. Set signal generator for:... - Page 22 PL-298 MFA-4p Page 22...
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Page 23: Probes
Cast aluminum body c/w cast aluminum cap and zinc flange, zinc plated locknut, and silicone rubber gasket • See page 28 for Flange and Mounting Details • Pre-amp is mounted in a Nema 4 cast aluminum enclosure PL-298 MFA-4p Page 23... -
Page 24: Stainless Steel Probe Msp-9
For high temperature and corrosion resistance applications • 304 stainless steel body c/w stainless steel clamp and silicone gasket • 5 ft. (1.5m) Belden 83321 Teflon cable potted in probe • Pre-amp is mounted in an enamel painted steel Hammond 1414N4E enclosure. PL-298 MFA-4p Page 24... -
Page 25: Standard Msp-12
6.75” BLK + amp. (172mm) • Phenolic body c/w die cast flange and zinc plated locknut, • See page 28 for Flange and Mounting Details • Pre-amp and cable are potted in probe body PL-298 MFA-4p Page 25... -
Page 26: Hazardous Locations Xpp-5
Class III • phenolic/aluminum body c/w die cast flange and zinc plated locknut • see page 28 for mounting details, and pages 11 and 27 for interconnection information. • pre-amp and cable potted in the Probe’s body PL-298 MFA-4p Page 26... -
Page 27: Interconnection Diagram For The Xpp-5
Interconnection Diagram for the XPP-5 PL-298 MFA-4p Page 27... -
Page 28: Mounting Details
Mounting Flange Mounting Flange Mounting Flange Mounting Flange APPLICABLE TO ALL PROBES -1 -1 -1 -1 -9. -9. -9. -9. EXCEPT MSP EXCEPT MSP EXCEPT MSP EXCEPT MSP AND MSP AND MSP AND MSP AND MSP PL-298 MFA-4p Page 28... -
Page 29: Applications
3.5" – 3.75" (88mm - 95mm) hole in the elevator wall. Any position from A to C may be used to maintain the Probe gap. 3.75" (95mm) A A A A B B B B C C C C PL-298 MFA-4p Page 29... -
Page 30: Shafts
(usually feed end) range of the probe A Ferrous Mass added behind the flight of a Screw Conveyor, where it passes the probe aids Borderline Operation. This mass must be added for all Non Ferrous Screws. PL-298 MFA-4p Page 30... -
Page 31: Non-Ferrous Window
+1/32. Use 305, 310, or 316 Stainless Steel, Brass, or Aluminum. The Probe may not touch the window if temperatures are in excess of 140°F (60°C) when using the low temperature probes or 500°F (260°C) when using the high temperature probes. PL-298 MFA-4p Page 31... -
Page 32: Bucket Elevator
Bucket Elevator Rotating Shaft of Rotary Feeder PL-298 MFA-4p Page 32... -
Page 33: Drive Sprocket On Rotary Feeder
Drive Sprocket on Rotary Feeder Screw Conveyor Flights PL-298 MFA-4p Page 33... -
Page 34: End Bearing On Screw Conveyor
End Bearing on Screw Conveyor PL-298 MFA-4p Page 34... -
Page 35: Troubleshooting
If diagnosis does not solve malfunction, probe, pre-amp or main-amp may be defective. • If no spare circuit boards or probes are available for interchanging, the MFA-4p may be tested as follows in order to determine which section is defective: a. - Page 36 Connect an ohmmeter across the black and white leads. iii. Nominal probe impedances are as follows: MSP-1 115 ohms MSP- 3 and MSP- 9 750 ohms If impedance deviates substantially from these values, an open or short circuit condition is indicated. PL-298 MFA-4p Page 36...
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Page 37: Index
Main amplifier NEMA 4, 5 Specifications, 5 Main amplifier open style, 5 Power, 5 MFA-4p, 17 Stainless Steel Probe MSP-9, 24 MFA-4P Main Amp, 13 Standard MSP-12, 25 MFA-4p Open Style, 9 Table of Contents, 3 Mini Sensing Probe MSP-1, 23 Temperature coefficient, 5... - Page 38 Notes...
- Page 40 *7ML19981DH01*...
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