Specifications are subject to change without notice (25.06.99)
1
Level Sensors
Control of CHARGING (swimming pools)
S 194 Output: 10 A SPDT relay
H 494 Output: 8 A DPDT relay
LED-indications: Power supply and relay ON
AC power supply
Product Description
Level control relay for con-
ductive liquids for swimming
pool applications. The relay
operates approx. 10 s after
the sensor is no longer im-
mersed in the water. Amplifier
for A94-.. sensors.
Type Selection
Plug
Output
Supply: 24 VAC
Supply: 115 VAC
Supply: 230 VAC
Circular, 11 pin
SPDT
S 194 156 024
S 194 156 115
S 194 156 230
Screw terminals
DPDT
H 494 166 024
H 494 166 115
H 494 166 230
Amplifier, Conductive/Capacitive
Types S 194, H 494 (Charging)
S194
H494
Output
SPDT relay
DPDT relay
Rated insulation voltage
250 VAC (rms)
250 VAC (rms)
(Cont./elec.)
(Cont./elec., cont./cont.)
Contact ratings (Ag-CdO)
(micro gap)
(micro gap)
Resistive loads
AC 1
10 A/250 VAC (2500 VAC)
8 A/250 VAC (200 VA)
DC 1
1 A/250 VAC (250 W)
0,4 A/250 VDC (100 W)
or
10 A/25 VDC (250 W)
4 A/25 VDC (100 W)
Small inductive loads
AC 15
2.5 A/230 VAC
2.5 A/230 VAC
DC 13
5 A/24 VDC
5 A/24 VDC
Mechanical life
5 x 10
7
operations
30 x 10
5
operations
Electrical life
10
5
operations
125 x 10
16
operations
Operation frepuency
7200 operations/h
7200 operations/h
Insulation voltages
Rated insulation voltage
AC
2.0 kVAC (rms)
2.0 kVAC (rms)
(Cont./elect.)
(Cont./elect.)
DC
None
None
Rated impulse withstand voltage
AC
4 kV (1.2/50 s)
4 kV (1.2/50 s)
(cont./elect.) (IEC 60664)
(cont./elect.) (IEC 60664)
DC
800 V
800 V
Output Specifications
H 494
S 194
Ordering Key
S 194 156 024
Housing
Type/function
Output
Power supply
2
Specifications are subject to change without notice (25.06.99)
Operation Diagram
Power supply
Sensor in water
Relay ON
Conductive/capacitive
Input Specifications
Sensor type
Conductive
A 94-10
Capacitive
A 94-20
Sensor voltage current
Conductive
24 VAC, 2.5 mA
Capacitive
8.2 VAC, max. 8 mA
H 494 (conductive)
H 494 (capacitive)
Accessories
Conductive level probe:
A 94-10
Capacitive level probe:
A 94-20
194, H 494
General Specifications
Indication for
Power supply ON
S194
LED, red
H494
LED, green
Output ON
LED, red
Environment
Degree of protection
IP 20 B
Operating temperature
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
Connection
S194
11-pin circular plus
H494
Screw terminals, for
mounting on DIN-rail
Material
Housing
S194
Noryl SE1
H494
PC/ABS blend
Plug
S194
Nickel-plated brass
H494
CYCOLOYC 2100
Approvals
UL, CSA
CE-marking
Yes
Wiring Diagrams
S 194 (conductive)
S 194 (capacitive)
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