µDIGI2-E
µDIGI2-E
29
Connections
Basic instrument has two rear connectors
CN1
and
CN2
. If relay
output option card is installed, two more connectors
CN3
and
CN4
appear. See all four connectors location and their pin out in
the right figure. All female provided terminal connectors are of
CAGE CLAMP
®
technology.
Terminals for
CN2
connector admit cables with section from
0.2mm² up to 1.5mm² (AWG 24÷14).
Terminals for
CN1
,
CN3
and
CN4
connectors admit cables with
section from 0.08mm² up to 2.5mm² (AWG 28÷12).
To perform wiring connections, strip the cable leaving from 7 to
10mm exposed to air, insert it in the proper terminal while
pushing down the key insertion tool to open the clip inside the
connector. Release the key tool to fix wire to the terminal.
Proceed in the same way for the rest of terminals. Once all
connections are done, plug connectors to the instrument.
Rear connectors location.
Key tool for cable insertion.
Notes:
NO
: Normally open contact.
CM
: Common contact.
NC
: Normally closed contact.
*
Polarity in CN1 is indistinct for DC power.
WARNING
Isolation
:
1500Vrms for 1 minute to signal terminals (CN2) and power terminals (CN1).
2500Vrms for 1 minute to signal terminals (CN2) and relays terminals (CN3 y CN4).
2500Vrms for 1 minute to power terminals (CN1) and relays terminals (CN3 y CN4).
Input signal connecting guidelines.
WARNING:
•
Where possible, connect neutral of the signal input (including current shunts) to the input common
of the indicator. If the input signal is sourced from an active circuit, connect the lower impedance
(usually circuit common) to the input signal common of the indicator.
•
For phase-to-phase line monitoring where a neutral does not exist, or for any other signal input in
which the isolation voltage is exceeded, an isolating potential transformer must be used to isolate
the input voltage from earth. Input common of the indicator then must be earth referenced for
safety.
•
It is recommended to use a current transformer for currents line measuring. If an external current
shunt is used, it must be inserted in the neutral return line. If isolation voltage is exceeded, then an
isolating current transformer must be used.
CN1*
1
Phase (AC)
2
Neutral (AC)
CN3
(relay 1)
1
NO
2
CM
3
NC
CN4
(relay
2)
4
NO
5
CM
6
NC
CN2
1
-IN (COMMON)
2
+IN 1A AC/DC
3
+IN 5A AC/DC
4
+IN SHUNT 60mV/100mV AC/DC
5
+IN 20V AC/DC
6
+IN 200V AC/DC
7
+IN 600V AC/DC
