INSTALLATION AND OPERATING INSTRUCTIONS
SKF Multilog On-line System IMx-8/IMx-8Plus
SKF Multilog On-line System IMx-8/IMx-8Plus
User Manual
Revision E
25 (63)
2.5.7 Connecting accelerometers (A1 to A8)
The SKF Multilog IMx-8/IMx-8Plus support 2-wire accelerometers on all 8 channels.
The standard accelerometer power can be enabled/disabled by software
configuration. Refer to the @ptitude Observer User Manual for further information.
Connect each accelerometer to the relevant input terminals on the appropriate
analogue connector located on the bottom end cap of the IMx, refer
, if using analogue channel A1, connect sensor output 1
(signal) to input A1 and sensor output 2 (common/return) to input G1.
Figure 11
Example connection of an accelerometer to analogue input 1
, illustrates a typical example where the accelerometer has an inner
screen or shield (isolated from the sensor body
–
to be grounded at the IMx) and an
outer braid, armour or shield (connected to the sensor body and grounded at the
machine
–
to be left floating at the IMx).
2.5.8 Connecting voltage sources (A1 to A8)
For voltage sources, 2-wire unpowered sensors or 3-wire accelerometers that are
externally powered, follow the guidance for accelerometers, in
to connect the
signal and common/return lines but in this case, configure the sensor power off.
2.5.9 Connecting 4
–
20 mA signals (A1 to A8)
To connect 2-wire 4-20 mA signals, configure the sensor supply off: note the IMx
does not power the loop. To convert the current value to a voltage that the IMx can
measure, a load resistor must be used on the input to each channel that a 4-20 mA
signal is connected to.
SKF provide 250-ohm load resistors for this purpose and double deck connectors to
facilitate the installation. These SKF provided resistors must be used and are colour-
coded blue, refer
