KROHNE Summit 8800 Vol 1 - Manual (Page 61)

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08/2013 - MA SUMMIT 8800 Vol1 R02 en
SUMMIT 8800 FIELD DEVICE CONNECTION 06
Figure 55 HART multidrop
6 .1 .2 Digital Transmitter Input Connections
These inputs are generally used for connection to pulse-counting meters such as Rotary or
Turbine meters, frequency measuring transmitters such as Density or Relative Density trans-
mitters or simple switch inputs. In all cases the required connections is typically as shown in the
figure below.
It is intended that the Input be connected to a +24V pulse input with Link LK8 in the off position,
this allows an input current of 10mA to flow. If the pulse source is operated from different volt-
age sources then LK8 should be switched to the ON position and an external resistor of value
that will allow 10mA to flow should be fitted in series with the D I/P 1+ Terminal.
Typical voltages and resistor values are given in the next table.
Voltage Resistor
15V 1k5
12V 1k1
5V 510
Table 21 Digital transmitter reference voltage and resistance
For terminal pin designations refer to the connections of the I/O board used.
Reference should be made to the meter or transmitter manual for correct installation and con-
nectivity guidance.