M2118
Operating Manual
V1.06 © 17.10.2011 MOSTEC AG, CH-4410 Liestal
2
Warranty
Mostec warrants this product to be free of manufacturing defects for a 2-year period after the original
date of purchase. Within this period, defective products will be repaired free of charge provided that the
defect occurred during normal operation. This warranty does not cover damage to the product resulting
from ordinary usage such as front panel scratches, broken control elements and corrosion, etc. The
customer is responsible for shipping and packing charges for products returned under warranty to
Mostec. Mostec warrants this product beyond the 2-year warranty period for an additional 2 years in
case of long term damages due to improper manufacturing. Such damages as poorly soldered joints or
other assembly problems are also covered by the warranty. Transportation damages are not covered by
the warranty and should be referred to the respective delivery service.
Technical description
The alarm unit M2118 is used to check or control any type of signal current or voltage signal. It converts
the input signal to an internal standard signal of for example 0 to 100.0%. In this range two alarm
contacts can be set independently. A 4-digit LED display shows the actual value and setpoints or alarm
values in the range of -1999 to 9999 units.
All settings as alarm values, hysteresis, range and operating mode of the floating contacts can be set
with a link cable, connected to a personal computer or a laptop.
Both alarm contacts can also be programmed with tiny push button switches behind the front panel.
A typical application would be to measure and monitor pressure in a process vessel. The pressure
transmitter converts the pressure of 1 to 10 bar to a current signal of 4 to. 20mA. The M2118 monitors
under- and overpressure in the vessel. It converts the 4... 20mA signal current to 0...100.0%. The alarm
is set between 0% (=1 bar) and 100.0% (=10 bar). With these floating alarm contacts, overpressure
valves, compressors, etc. are driven directly.
Optionally, a galvanic isolated output signal of 0...20mA or 4...20mA is available.
Power supply: Universal supply 20 to 253VAC/DC