Connection Of Analog Inputs, Ai - SPM intellinova compact INS06 Ex Assembly, Installation And Operation Instructions

Connection of Analog Inputs, AI

The System Unit has three channels for continuous moni-
toring of analog signals and measures current from 0 to
20 mA. Measuring units, range, quantities, alarm limits
etc. are set up in Condmaster
Connection of analog sensors located in hazardous
areas zone 0 and 1
If Analog sensor is located in Ex hazardous zone 0/20
or 1/21, the Intellinova ®
dered as special. The actual type of sensor intended to
be used must be specified at the time of ordering the
Intellinova System unit, so that suitable Ex interfaces can
®
be included.
Connection of analog sensor in safe zone
The cable length may be up to max. 100 m. A 100-ohm
shunt resistor is used for current measurement.
The push-in terminal blocks on the circuit board are
marked with numbers:
AI channel 1 + 20
– 21
AI channel 2 + 22
– 23
AI channel 3 + 24
– 25
Holes for additional cable entries intended for signal ca-
bles to the analog inputs have to be drilled. Drill the holes
in the punch marks on the enclosure with maximum 0.5
mm larger diameter than the cable gland. Cable glands
of type "Ex e" or "Ex t" with suitable size for the cables
must be used. The maximum cable gland size is M20 x1,5.
• Make sure that the system unit is in power off position.
• Disconnect the system unit from the mains power
source. Check with a voltage tester to ensure that the
unit is voltage-free.
• Mount terminal blocks (option SPM Instrument 93380)
on the DIN rail (1).
• Drill holes and mount suitable Ex cable glands on the
enclosure.
• Tighten the inlet sealing nuts. The tightening torques
must be followed by the appropriate manual.
• Open the cable gland and guide the sensor cable
through the inlet.
• Prepare the end of the sensor cable and push the
conductors firmly into respectively terminal.
• When using a shielded cable, connect the shield to
the protective earth terminal block (2) via a short
cable soldered on the shield. The shield should not
be connected to the sensor end.
Analog Inputs
.
®
System units need to be or-
Analog inputs on circuit board
1
2
+ –
• Tighten the inlet sealing nut. The tightening torques
must be followed by the appropriate manual.
• Cut and prepare internal single conductor cables as
shown in the figure above (3). Push the cables firmly into
respectively terminal and tighten the contact screws.
• Secure the cables with cable ties mounted on the cable
tie mounting bases.
• Connect the mains power source and switch on the
System Unit with the ON/OFF button.
• Perform periodic pressure test according to "Service
and Maintenance" on page 19 to check that the
enclosure is properly sealed.
– 15 –
20 21 22 23 24 25
+ – + – + –
Ch.1 Ch.2 Ch.3
AI
+ – + – + –
3
V- V+
24 VDC/0.75A
LO
ON
Vout ADJ.
100-240 VAC
0.5A
47-63Hz
Protective
earth rail
N L
4 – 20 mA
Sensor