INM 9370-RD Rev 5
14
4.6.2 Fitting FS32 Spur Surge modules
Spur Surge modules are pluggable units that integrate easily with the standard
pluggable connector and which direct excessive spur surge currents to the protective
local ground.
Figure 4.7 - FS32 Spur Surge module on carrier
To fit an FS32:
1. Unscrew the two captive screws securing the standard pluggable connector
(supplied on the carrier) and remove it from its socket.
2. Insert the FS32 module into the now vacant socket on the carrier, tighten the two
side securing screws to a recommended torque of 0.4 Nm.
3. Ensure also that the central “protective ground” screw is engaged and tightened
to a recommended torque of 0.4 Nm to provide a low impedance path for surge
currents.
4. Fit the connector (removed at Step 1 above) into the socket on the FS32 and
tighten its two securing screws also to a recommended torque of 0.4 Nm.
Removal of a Spur Surge module is the reverse of the fitting process. See also Section
5.4.1 on page 18 for information on cable ‘adjustment’ if one of these modules is
taken out of use.
4.7 Blanking Plugs
Blanking plugs of factory-supplied Fieldbus Barriers are lightly tightened for ease of
removal. Any blanking plugs that are not removed from the fieldbus barrier must be
tightened to the required torque to meet the IP rating.
Two types of blanking plug are supplied with the Fieldbus Barrier as shown in figures 4.8
and 4.9 below and should be tightened to a torque rating as shown in the table below.
Type A
4.8Nm
Type B
12Nm
Figure 4.8 - Type A Blanking plug
Figure 4.9 - Type B Blanking plug
