Functional description
Page 10 of 72
MSM-USM2G-BA-UK-004
Two methods can be used to not only display the individual fault alarms optically, but also to transmit
them in parallel to the input or output via relay contact (1:1 relay):
1. Integration of additional relay cards (8 NO contacts each) for use as 1:1 outputs. These relays
can be freely assigned in the parameterizable fault annunciators. The relay cards are optional
and must be considered when ordering.
2. Connection of external relay modules at the CAN bus socket. For further information on the
expansion modules, please refer to the separate data sheet MSM-EM-DB-UK.
3.2 Additional cards (optional)
Optionally, analog input cards and relay cards can be integrated into the fault annunciator. Mixed use
of analog input cards and relay cards is also possible.
3.2.1 Analog input cards
Depending on the size of the device, a USM can be equipped with up to 5 analog input cards. Each
input card has 4 analog inputs. The inputs can be configured as voltage or current inputs depending
on the application. The following options are available:
0 … 10 V
-
10 … 10 V
0 … 20 mA
4 … 20 mA (with wire break monitoring in the fault annunciator)
The measured values can be forwarded to a higher-level system via the Modbus RTU/TCP, IEC
60870-5-101/104 or the IEC 61850 interface. Furthermore, the measured values can be monitored,
and in case of an error a fault alarm is generated.
The alarm can be parameterized so that it is triggered at one of the following events:
when the limit value is exceeded
if the value falls below the limit value
if the measured value is within a range
if the measured value is outside a range
3.2.2 Relay cards
The relay cards (8 NO contacts each) are independent from the 4 function relays of the annunciator
and can be assigned the following functions:
1. In- or output parallel multiplication and forwarding of single alarms within the annunciator and
without the requirement for connection of external MSM relay modules
2. Output of collective alarms and horn control
3. Control of the relays via the IEC interface
The 8 relays of one board have one common root. Triggering and functionality can be adapted
individually by means of the parameterization interface on the web-server, e.g. inversion of the signal
or wipe duration for pulse commands. It can be freely selected which input the respective relay
follows, the assignment can be 1:1 (one relay follows one input) or n:1 (several relays follow one
input). It is also possible to output special functions, such as horn control or output of a collective
alarm on the 1:1 relay. In addition, further parameters are available, e.g. the inversion of the signals
and the wiping time for pulse output.
For further information on the integrated fault alarm sequences, please refer to the
separate documentation "Alarm sequences of the EES fault annunciators".
(Dokumentenname SM-MA-ZI-DE).
