555 M1 03 D
07-03-2007
Page 2
CAUTION
Installation, initial start-up and maintenance may only be performed by trained personnel. All applicable European and national
regulations regarding installation of electrical equipment must be adhered to.
- The device may only be connected to supply power which complies with the specifications included in the technical data and on
the serial plate.
- The device must be disconnected from all sources of power during installation and maintenance work!
- The device may only be operated under the conditions specified in the operating instructions!
DESCRIPTION
The MAXIMAT LW CZ ... compact leakage sensor is used as a leakage monitoring device for permanently installed containers used for
the storage of non-flammable, water endangering liquids.It is equipped with three different output circuits:
- A binary output for controlling a coupling relay or the digital input at a PLC
- A 0 to 20 mA current output for controlling an analog input channel, e.g. a programmed logic controller (PLC)
- Self-monitoring measuring circuit in combination with the MAXIMAT SHR C... measuring transducer with 2-wire connection
Applications:
Note that stored liquids may not tend to precipitate insulating or conductive sediments.C.s.
CE mark:
In accordance with low-voltage directive (73/23/EWG), EMC directive (89/336/EWG) and EN 50 082-2:1995, EN 55
011 (class A):1998C.
TECHNICAL FEATURES
Supply power:
24 V DC ± 10%
CAUTION: power supply with current limiting or 250 mA fuse recommended
Connected load:
Approx. 3 W
Ambient temperature:
-20 to +60° C
Container pressure:
Atmospheric (0.8 to 1.1 bar)
Hysteresis:
About 2 mm
Switching height:
5 mm as the minimum
Connecting cable:
6 m long PCV cable
shielded, 7x0,5 mm
2
for MAXIMAT LWC.
shielded, 7x0,34 mm
2
for MAXIMAT LWC25
Outputs:
– Binary output: +DO / -DO max. 30 mA at 24 V DC
– Current output: +AO / -AO, 0 to 20 mA
– Output for MAXIMAT SHR C... measuring transducer
Terminals:
Housing: IP 65 – PBT – EN 60529
Screw terminals, IP 20 for MAXIMAT LW CZD and K
Maximum wire cross-section: 2.5 mm
2
DIP Switch: Operating
Mode
DIP1
DIP2
DIP3
DIP4
Binary output
ON
ON
ON
OFF
Current output
OFF
OFF
OFF
OFF
MAXIMAT SHR C
OFF *
OFF *
OFF *
OFF *
* = Default setting
CAUTION: be sure to examine the DIP switch settings before switching supply power on!
Indicators:
Green LED on the connector PCB:
Run = LED illuminated
Alarm / error = LED off
Measuring circuit for use with SHR C...
Cable inductance:
Maximum approx. 5 mH
Cable capacitance:
Maximum approx. 0.5 μF
Measuring circuit cable
Length:
Maximum 300 m
Wire cross-section:
Minimum 0.5 mm
2
DIBT Approval
Approval no. Z-65.40-316 for overfill inhibitors and leakage sensors in accordance with WHG §19
Note:
The accompanying “General Building Supervisory Approval no. Z-65.40-316” is an integral part of the operating instructions
and all stipulations contained therein must be adhered to !
