Main Speed Sensor - Siemens Milltronics BW500 Operating Instructions Manual

Installation
5.5 Speed
5.5.2

Main Speed Sensor

①
②
Note
Shields are common, but not grounded to chassis. Run cable shields through SHLD
terminals and ground at BW500 and BW500/L only.
Connect BW500 and BW500/L terminal 16 to speed sensor terminal:
● '2' for clockwise speed sensor shaft rotation
● '3' for counter-clockwise speed sensor shaft rotation.
Speed sensor shaft rotation is viewed from the front cover of the speed sensor enclosure.
Input device in the form of open collector transistor or dry contact across BW500 and BW500/L
terminals 16 / 17 will also serve as a suitable speed signal.
If a speed sensor other than the models shown is supplied, consult with Siemens for details.
For the Main Speed Sensor input, switch SW3 should be set to "HTL" for use with speed
sensors providing 12V output logic, open-collector NPN outputs or dry contacts. This "HTL"
setting provides a switching threshold of 5.5 V (nom.) with +/- 1V hysteresis and an internal pull-
up of 12 V through a 3.3 kohm resistor.
To use a speed sensor with 5 V logic-level outputs, the "TTL" setting on SW3 provides a
switching threshold of 2.9 V (nom.) with +/- 0.5 V hysteresis and an internal pull-up of 5V (nom.)
through a 1.5 kohm resistor.
A second speed sensor input can be added using the Auxiliary inputs: the second speed input
allows calculation of Differential Speed. For more information, see
Parameters (Page 153).
36
Speed sensor
WS300 example
Auxiliary Inputs
BW500 and BW500/L
Operating Instructions, 12/2016, A5E33482052-AD
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