Barksdale UNS-VA/SB4 Operating Instructions Manual - Page 5
Browse online or download pdf Operating Instructions Manual for Switch Barksdale UNS-VA/SB4. Barksdale UNS-VA/SB4 6 pages. Level switch
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Group 3 SPST
Terminal
red
8
blue
7
pink
6
grey
5
yellow
4
green
3
brown
2
white
1
NO (NC)
Terminal
brown
2
white
1
Temperature switches (TS or TP) and temperature sensors (PT100) are connected to the last
contacts possible, unless otherwise specified.
CAUTION
Temperature switches (TS or TP) and temperature sensors (PT100) must be tested for functioning
before commissioning.
Connection UTS 2000
Terminal
red
8
blue
7
pink
6
grey
5
yellow
4
green
3
brown
2
white
1
8
Group 4 SPDT
Terminal
black
9
red
8
blue
7
pink
6
grey
5
yellow
4
green
3
brown
2
white
1
Change over
Terminal
green
3
brown
2
white
1
CAUTION
The following notes must absolutely be observed:
The permissible data (see type label) must be kept.
The level switch must be protected against magnetic fields.
The sliding tube of the level switch must not be bent and severe shocks must be avoided,
since otherwise the inert gas contacts (reed contacts) will be damaged.
Existing adjusting rings, gripping rings or clamping brackets must not be displaced since
otherwise the SPST or SPDT function is no longer guaranteed.
The max. inrush power according to the data sheet is:
for level switch – SPST – with 12 mm or 13 mm sliding tube 100 VA
for level switch – SPDT – with 12 mm or 13 mm sliding tube 60 VA
for level switch – SPST – with an 8 mm thick sliding tube 40 VA
for level switch – SPST – with an 8 mm thick sliding tube 3 VA
These power values must not be exceeded since otherwise the switching contacts will fuse. A
short circuit will immediately destroy the switching contact.
Long cables take a high capacitive charging current during switching-on. This charging current can
be limited by a current limiting resistor of about 20 to 30 Ohm <1.W>. The resistor is installed in the
connecting housing of the level switch.
Metal filament lamps take the three or four-fold of the current during switching-on. Level switches
with a switching power of e. g. 100 VA can only switch 25 W filament lamps. This must be taken
into account when a filament lamp is used for a continuity check.
When switching direct voltages, a diode must be connected in parallel with inductive consumers,
such as relays or solenoid valves, for spark suppression in locking direction.
Cable glands of level switches must be checked for tightness at the connecting housing and at the
level switch to ensure that no spray water can penetrate.. If necessary seal by means of filler.
8
Maintenance/Cleaning
WARNING
Check the level switch regularly for functioning.
If the level switch does not work properly, stop operation immediately!
Maintenance
The level switch requires no maintenance.
Cleaning
CAUTION
Do not bend or hit the stem when cleaning the guide tube!
Proceed carefully to remove medium residues from the guide tube, if necessary.
9