Balluff BML-S Series, User Manual, Page: 36 / 130

10
4.3 Assembling the limit switch magnets
The front and rear limit switch magnets must always be
assembled on the right side of the sensor head.
If the emergency stopping distance exceeds the length of
a limit switch magnet, several magnets may be lined up.
The limit switch sensor becomes active once it moves into
the magnetic area of the limit switch magnet.
Limit switch magnets in housing
►
Fasten the front limit switch magnet with the nose to
the rear and the rear limit switch magnet with the nose
to the front.
Traveling distance (measuring range)
Emergency stopping
distance
Rear limit
switch magnet
Front limit
switch magnet
Emergency stopping
distance
Limit switch magnets without housing
►
For the front limit switch magnet mount the groove to
the right of the centre and to the left of the center for
the rear limit switch magnet.
Limit switch magnets bonded to the
machine
Magnetic tape
Sensor head
Comply with the distance from the
installation surfaces
Limit switch magnets are not designed for
detecting positions. Use the reference points to
detect positions!
4.4 Electrical connection
Note the information on shielding and cable
routing on page 12.
1.1.1 Connector S284/cable connection
BML-S…B/E0-Q
53
_-M4
00
…/
BML-S1C0-Q
53
_-M4
00
… (HTL output)
S284
Pin
Cable
color
Signal Description
1 WH White +A Rectangular signal
3 GN Green +B Rectangular signal,
90° phase-delayed to
A
7 BU Blue GND Sensor head ground
(0 V)
8 RD Red UB Supply voltage
10 to 30 V DC
Shield TR Trans-
parent
PE PH shield PE
connector housing/
shield
Pins 2, 4, 5, 6, 9, 10, 11, and 12 are not assigned.
Tab. 4-1: BML-S…B/E0-Q53…/BML-S1C0-Q53… pin assignment
BML-S…B/E0-Q53_-M400…/
BML-S1C0-Q53_-M400…: 4-wire cable,
shielded.
All others: 12-wire cable, shielded.
12-wire cable with sense lines (measuring lines) to avoid
voltage drops in the supply.
Fig. 4-2:
1
10
9
12
8
7
6
5
4
11 3
2
M12 plug pin assignment (view on pin side)
4
Installation and connection (continued)
Rear limit switch magnets:
Groove left of center
Front limit switch magnets:
Groove right of center
BML-S _ B/C/E0-Q _ _ _ -M4 _ _ - _ 0-KA _ _ /KA _ _-S284
Incremental Magnetic Linear Encoder
english