Manual 82510
Magnetic Pickups and Proximity Switches
Woodward
1
Contents
W
ARNINGS AND
N
OTICES
............................................................................................................... 2
C
HAPTER
1.
M
AGNETIC
S
PEED
P
ICKUPS
......................................................................................... 3
General Information ...................................................................................................................................... 3
MPU Installation ............................................................................................................................................ 5
Installation and Operation Safety Requirements ........................................................................................ 10
Troubleshooting Magnetic Pickups ............................................................................................................. 11
MPU Resistance List ................................................................................................................................... 11
C
HAPTER
2.
P
ROXIMITY
S
WITCHES
............................................................................................... 12
General Information .................................................................................................................................... 12
Proximity Switch Features ........................................................................................................................... 12
Types of Proximity Switches ....................................................................................................................... 13
Proximity Switch Power Supply .................................................................................................................. 13
Checking Proximity Switch Operation ......................................................................................................... 14
Proximity Switch Wiring ............................................................................................................................... 14
A
PPENDIX
.
U
SING THE
O
UTPUT OF A
W
OODWARD
MPU
TO
D
RIVE A
R
EMOTE
T
ACHOMETER OR
O
THER
D
EVICE
............................................................................................................................. 15
R
EVISION
H
ISTORY
....................................................................................................................... 16
Illustrations and Tables
Figure 1-1. Magnetic Pickup Dimensions ..................................................................................................... 4
Figure 1-2. Magnetic Pickup Output Waveforms .......................................................................................... 5
Figure 1-3a. MPU Models ............................................................................................................................. 6
Figure 1-3b. CSA/ATEX Models ................................................................................................................... 7
Figure 1-4. Maximum Air Gap Allowed to Provide Usable Signals for Most Electronic Controls ................. 8
Figure 1-5. Maximum Air Gap Allowed to Provide 1.5 V (ac, rms) on EGM Control .................................... 9
Figure 2-1. Air Gaps for Radial and Axial Sensing Proximity Switches ...................................................... 13
Figure 2-2. Suggested Wiring for a “Sinking” Type Proximity Switch ......................................................... 14
Figure 2-3. Suggested Wiring for a “Source” Type Proximity Switch.......................................................... 14
Released
