NATIONAL CONTROLS 05SLA User Manual
2-2
OHMS
1K 250K
SENSITIVITY
ADJUST
3.45 MAX
2.90
SENSITIVITY ADJUST
ACCESS COVER
1
2
3
4
5
6
7
8
VOLTAGE
1
7
6
5
4
3
2
8
INPUT
COMMON
PROBE
1K-250K OHMS
NATIONAL CONTROLS
CORPORATION
WEST CHICAGO, IL. 6018
5
SENSE RANGE
:
MODEL:
LIQUID LEVEL CONTROL
FILE NO.LR33434
FILE NO.E61377
LNC-05SLB-441
1.75
2.40
C
L
PIN CONFIGURATION
DWG\4787/9/93
N.C.
LIQUID LEVEL CONTROL SERIES
Resistance Sensors (Single Probe)
05SLA and 05SLB Series
FEATURES
Solid state sensing circuitry
●
Single probe level detection
●
User adjustable sensing resistance
●
Rugged octal plug-in housing
●
Heavy duty internal construction
●
●
100% functionally tested
●
These controls utilize a single probe input
for maintaining a level of liquid. A built-in
time delay prevents rapid cycling. They are
packaged in a standard octal plug-in hous
ing. The probe and sensing circuit are iso
lated from line voltage via a transformer. The
probe is driven with an AC signal to prevent
plating. The output is an electro-mechanical
relay rated at 10 A.
Operating Logic: In the Model 05SLA
(Pump Down) the output relay is deactivated
as long as no liquid is in contact with the
probe. As the liquid makes contact with the
probe, a time delay is initiated. At the end
of the time delay, the output relay is acti
vated until the liquid breaks contact with the
probe.
In the Model 05SLB (Pump Up) the out
put relay is deactivated as long as the liquid
is in contact with the probe. As the liquid
drops away from the probe, a time delay
is initiated. At the end of the time delay,
the output relay is activated until the liquid
touches the probe again.
File #E61377
If the tank is non-conductive, a second
(common) probe must be installed at a level
where it will always be submerged.
SPECIFICATIONS
CONTROL TYPE
On/Off Resistance Sensing: Probe resistance
above set point activates output relay after a
fixed time delay
Time Delay: 5 sec. ±10%, other delay times
available
Sensing Voltage: 18 VAC, max. RMS
Sensing Current: 2.0 mA, max. RMS
Sensitivity Adjustment: 1K to 250 K ohms ±10%
-
factory set at 100 K ohms ±10%
-
INPUT
Operating Voltage: 24, 120 or 230 VAC ±10%
Power Consumption: 1.2 VA max.
Frequency: 50/60 Hz
OUTPUT
Type: Relay contacts, SPDT (1 form C)
Rating: 10 A resistive at 120, 240 VAC; 100 mA
at 5 VDC minimum load current
Life:
Mechanical: 5,000,000 cycles
-
Electrical: 100,000 min. at full load
PROTECTION
Isolation: 1500 VAC between probe and other
terminals
-
MECHANICAL
Terminations: 8-pin octal plug
Mounting: Socket mount, part number
MS0-0008P-012
ENVIRONMENTAL
Operating Temperature: -23°C to 55°C
ORDERING INFORMATION
LOGIC TYPE INPUT VOLTAGE PART NUMBER
05SLA - Pump Down 24 VAC —
05SLA - Pump Down 120 VAC LNC-05SLA-441
AMETEK National Controls Corp. • 1725 Western Drive • West Chicago, Illinois 60185 • Tel: 800-323-2593 • 630-231-5900 • FAX: 630-231-1377 • www.nationalcontrols.com
05SLA - Pump Down 230 VAC
05SLB - Pump Up 24 VAC
05SLB - Pump Up 120 VAC
05SLB - Pump Up 230 VAC
ACCESSORY PART NUMBER
Probe Holder with Ground LLH-11383-010
Probe, 6” Long, 1/4” Dia., S.S.
Probe, 12” Long, 1/4” Dia., S.S.
Probe, 24” Long, 1/4” Dia., S.S.
Probe Assembly, Plastic Body LLP-001/2-011
Octal Socket, Back Panel Mount
Hold Down Strap for Control ASY-STRAP-7.00L
LLP-06.00-OSS
LLP-12.00-OSS
LLP-24.00-OSS
MSO-0008P-012
—
LNC-05SLB-447
LNC-05SLB-441
LNC-05SLB-445
Consult factory for any special requirements not
listed in catalog (minimum order requirement may
apply).
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