Balluff BML SL1-ALZ-ZZ Series, User Manual

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4
Installation and connection (continued)
4.4.2 Connector S4
S4-pin Cable
color
Signal
IO-Link without
1Vpp
(BML SL1-ALZ0-
U1ZZ-ZU1L-S4)
Description
Fig. 4-10:
1
2
3
4
Pin assignment of S4 plug (M12,
4-pin), view from above on
sensor head)
1 BN L+ Supply voltage 18...30 V DC
2 WH OUT2 Switching output 2
3 BU L– Sensor ground (0 V)
4 BL C/Q/OUT1
Communication line /
Switching output 1
Tab. 4-6: Pin assignment of S4 connector
4.5 Shielding and cable routing
Defined ground!
The linear head system and the control cabinet
must be at the same ground potential.
Shielding/cable routing
To ensure electromagnetic compatibility (EMC), observe
the following:
When ducting the cable between the sensor, controller,
and power supply, it is important to avoid going near high
voltage cables due to interferences.
Stray noise from AC harmonics (e.g. from phase angle
controls or frequency converters) are especially critical and
the cable shield offers very little protection against this.
Magnetic fields
The position measuring system is a magnetically coded
system.
It is important to maintain adequate distance between the
position measuring system and strong, external magnetic
fields.
Cable routing
Do not route the cable between the position measuring
system, controller and power supply near high voltage
cables (inductive stray noise is possible).
The cable must be routed tension-free.
Bending radius
For information on the permissible bending radius, see the
connector on page 45.
Cable length
IO-Link recommends limiting cable length to 20 m. Longer
cables may be used if their construction, shielding and
routing prevent noise interference.
Observe voltage drop in cable!
The nominal voltage on the BML must not be
undercut. Each wire in the cable has a
resistance of 0.2 Ohm/m. When calculating the
drop in voltage, account for the feed and return
lines, i.e. the total resistance is 0.4 Ohm/m.
For resistance of accessory cable, see
Section 11.6 on page 44 and Section 11.7
on page 45.
BML SL1-ALZ _-_ _ ZZ- _ _ _ _ - _ _ _ _
Absolute Magnetically Coded Position Measuring System
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