INSTALLATION AND OPERATING INSTRUCTIONS
Mounting the IMx-8/IMx-8Plus
SKF Multilog On-line System IMx-8/IMx-8Plus
User Manual
Revision E
17 (63)
Like the IMx-16 variants, the IMx-8/IMx-8Plus are designed to be DIN rail mounted,
above, shows an IMx device DIN rail mounted in a SKF IP65 classified
cabinet.
The IMx is mounted using the DIN rail bracket attached to the rear face of the device,
Figure 4
An IMx device DIN rail mounting bracket
To mount it on the DIN rail, first angle and offer it to the rail so that it is hanging on
the upper part of the bracket and then rotate downwards and snap it in place with the
lower part of the bracket.
To dismount first remove any connectors/wiring, then snap the lower part of the
bracket from the DIN rail and lift it up a little. The IMx is now free to be lifted away
from the DIN rail.
Careful attention should be paid to system grounding, earthing, as the IMx inputs are
single ended and the common or return signal connections are at the same potential
as the immediate IMx casing. This is isolated from the DIN mounting rail by the
insulating mounting bracket and a green/yellow case earth lead is provided to enable
a single deliberate connection to an instrument quality ground. In Figure 3 this can be
seen terminating at the cabinet earth rail which should itself be isolated from the
outer enclosure and connected only to an instrument ground, when one is available.
The same ground should ideally be used for sensor cable screens so that the IMx
system is grounded at only that one point.
In all cases avoid situations where the IMx ground connects to multiple ground
planes as it is likely there will be differences in potential that could affect sensor
signals. Similarly avoid sharing a ground used by machinery or other non-instrument
grade equipment as their operation is likely to cause disturbances in the potential of
that ground plane and if occurring would directly impact the IMx vibration readings
and/or bias voltage measurements. Be aware that by their nature issues caused by
non-ideal grounding schemes may be inconsistent and may only occur intermittently
due to changes and operations elsewhere.
