Specifications are subject to change without notice (25.06.99)
1
Mounting
Output
Supply: 24 VAC
Supply: 115 VAC
Supply: 230 VAC
For DIN-rail
SPDT
ELA C R02 100K
ELA C R11 100K
ELA C R23 100K
Level Sensors
Amplifier, Conductive
Type ELA (Charging/Discharging)
Product Description
Ordering Key
Level control relay with
max./min. control of charg-
ing/discharging. The sensitivi-
ty is adjustable on absolute
scale. If more than two levels
Housing
Function
Type
Output
Power supply
Measuring range
Type Selection
Level control for conductive liquids
Max./min. control of charging/discharging
Adjustable sensitivity: 5 to 100 k
Output: 5 A SPDT
For mounting on DIN-rail in accordance with
DIN/EN 50 022
45 mm housing
LED-indications for relay and power supply ON
Possibility of parallel connection
Sensor supply max. 6 V
pp
AC power supply - reinforced insulation
are required, up to four relays
can be connected in parallel.
Single level control is possi-
ble (sensitivity 2.5 to 50 k
).
Input Specifications
Input
through Y1 & Y2
Max. level
through Y1 & Y3
Min. level
Range
Max./min.
5 to 100 k
Single-level
2.5 to 50 k
Sensor voltage
6 V
pp
100 Hz
Sensor current
Max. 100 mA
Clock in/clock out
Clock in/out: Y4-Y1 (Gnd.)
f = 100 Hz, U = 6.5 V
Master/slave: Y5-Y1
(open = Master)
Hysteresis
< 100%
Output Specifications
Output
SPDT relay
Rated insulation voltage
250 VAC (contact/elect.)
Contact ratings (AgCdO)
(micro gap)
Resistive loads
AC 1
5 A/250 VAC
DC 1
5 A/24 VDC
Small inductive loads AC 15
2 A/250 VAC
DC 13
3 A/24 VDC
Mechanical life
40 x 10
6
operations
Electrical life
10
5
operations
(at max. load)
Operating frequency
7200 operations/h
Supply Specifications
Power supply
Overvoltage cat. III (IEC 60664)
Rated operational voltage
through term. A1 & A2 R02
24 VAC 15%
R11
115 VAC 15%
R23
230 VAC 15%
Frequency
50/60 Hz
Galvanic separation
2 kV, class II
Voltage interruption
40 ms
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 s)
Rated operational power
2.5 VA
ELA C R23 100K
2
Specifications are subject to change without notice (25.06.99)
ELA
General Specifications
Power ON delay
< 3 s
Accuracy
< 20%
< 50% when connecting of
up to 4 relays in parallel
Drift
< 1%/C
Indication for
Power supply ON
LED, green
Output ON
LED, yellow
Environment
Degree of protection
IP 20
Pollution degree
3
Operating temperature
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
Weight
270 g
Approvals
UL, CSA (only ELACR12100K)
CE-marking
Yes
Mode of Operation
Max./min. control of charg-
ing/discharging (selectable on
front).
Charging
The relay operates when the
level drops below the min. level
sensor (Y3). The relay releases
if the level reaches the max.
level sensor (Y2). The refer-
ence (additional electrode or
container of conductive mate-
riel) is connected to Y1.
Discharging
The relay operates when the
level reaches the max. level
sensor (Y2), if the min. level
sensor (Y3) is in contact with
the liquid. The relay releases
when the min. level sensor no
longer is in contact with the
liquid. The reference (addi-
tional electrode or container
of conductive material) is con-
nected to Y1.
Single-level sensing
The ELA level control relay is
also usable for single level
detection. In this case the sen-
sor is connected to Y2/Y3 (Y2
and Y3 interconnected). The
sensitivity will be halved.
Multi-level sensing
If more than two levels are
required, up to four amplifiers
can be coupled in parallel. Y1
(common) and Y4 (clock in/
out) on all systems must be
interconnected. Furthermore,
on all slave units Y5 must be
connected to Y1. Depending
upon the distance between
the units it may be necessary
to use shielded or twisted
cable.
Level Setting
Setting of level on absolute
scale, 5-100 k
.
For single-level sensing (Y2
& Y3 interconnected) the
sensitivity is 2.5 to 50 k
.
Wiring Diagram
k
>
Accessories
Conductive level probes:
VH, VPC, VPP, VN, VNI, VNY,
VNYI, VT, VTI, VS
Operation Diagram
Max.
Min.
(PE)
Y3
Y2
Y1 Y5 Y4
A2
A1
L
N
11
12 14
#
Y2-Y1
Y3-Y1
Min.
Max.
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