Connection Of Digital Inputs, Di / Rpm - SPM intellinova compact INS06 Ex Assembly, Installation And Operation Instructions

Connection of Digital Inputs, DI / RPM

The digital inputs DI/RPM can be used for the connection
of RPM sensors (inductive proximity switches) for speed
measuring. Inductive proximity switches of type NAMUR (DIN
EN 60947-5-6) can be connected to include Ex interfaces.
Recommended inductive proximity switch of type NAMUR
is SPM Instrument part number 90576 or 90577.
A pulse is generated when a metallic object, normally the
shaft key, passes the proximity switch. The number of pulses
per revolution can be specified in Condmaster. One pulse
per revolution is normal.
The proximity switch is mounted close to a rotating machine
part. Adjust the gap between the transducer and the key in
accordance with the manufacturer's instructions. NB. Key
with sharp edges should be rounded as the edges will often
cause two pulses instead of one.
Intellinova Compact Ex INS06 Ex can be delivered fully
®
equipped with Ex interfaces for two DI channels. Intellinova
Compact Ex units ordered with less than two channels can be
updated on site with additional Ex interfaces. Contact SPM
Instrument for update kit including modification instructions.
• Make sure that the System Unit is in power off position.
• Open one of the M16 x1.5 cable entries (D, see page 7)
and guide the cable end through the cable entry.
• Cut and prepare the conductors.
• Connect the conductors firmly into respectively Ex
interface, designation DI1 to DI2. Tighten the contact
screws.
• Seal unused cable entries with a blanking plug and
tighten the gland nuts with an open-ended 14 mm
spanner, see "Cable gland torque moment" on page 7.
• Perform periodic pressure test according to "Service
and Maintenance" on page 19 to check that the en-
closure is properly sealed.
A red status indicator on the circuit board, next to the termi-
nal block, lights when a DI/RPM channel is active.
Digital Inputs
Explosive Area
NAMUR
sensor
®
Connection of NAMUR sensor to DI/RPM Interface
– 14 –
Inductive proximity switch
Inside nR Enclosure
DI/RPM
Interface
BN
BU
1
to circuit
board
4.1 4.2