AS 2.0 D24
12
3.3.2
Special overspill protection
Possible applications: Monitoring containers, tanks, tankers, drainage shafts, waste water
treatment plants, sewage treatment plants, basins, weighing tanks, pipelines, filling devices,
water supply systems, water overflows, oil separators, leakage monitoring of catch basins,
room monitoring, dry-running protection for pumps, etc.
Storage
tank
External
acknowledgment
99%
SPS
97%
AS2.0 D24
24 VDC
230 VAC
C
B
A
A2
A1
AS2.2
D24
HL-Alarm
C
B
A
T-BUS
RS485
bl
sw
gr
bl
sw
gr
Reset
4
3
HL alarm NPN OC
acknowledgment / HL alarm / delayed delay / Fault
message redundant
Relay 3 Relay 1.1 Relay 1.2 OC 2 Relay 4
Relay de-energized
in alarm condition
AF *
overfill protection
Figure 2 Using special overspill protection with AS2.0 and AS2.2 - schematic
Storage
tank
97%
Storage
tank
External
acknowledgment
97%
AS2.0 D24
24 VDC
230 VAC
C
B
A
A2
A1
bl
sw
gr
Reset
4
3
Relay de-energized
in alarm condition
AF *
overfill protection
AS2.0 D24
C
B
A
bl
sw
gr
TBUS
TBUS
SPS
HL alarm NPN OC
acknowledgment / HL alarm / delayed delay / Fault
message redundant
6 General alarm + 24V
7 Acknowledgment
Relay 3 Relay 1.1 Relay 1.2 OC 2 Relay 4
Figure 3 Using special overspill protection with two AS2.0 devices - schematic