Description
2.4 Design
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
21
2.4.4 Inputs/outputs
● 2 analog inputs (4 to 20 mA) for process gas temperature and pressure
● 2 analog outputs (4 to 20 mA) for gas concentration or for concentration and transmission
● 1 configurable binary input for quality information of external sensor
● 2 freely configurable binary outputs (display of faults, maintenance request, function
monitoring, alarms for limit violations of measured value or transmission)
● Optional: 1 PROFIBUS DP interface with:
– Output of gas concentration as cyclic data
– Alarm output, alarm classification
– Input for temperature and/or pressure data for compensation
The PROFIBUS DP protocol provides DPV0, cyclic data. Measured values are provided
with additional quality data.
Note
The PROFIBUS DP hybrid cable provides an unused pair of wires to connect one of the
analog or binary inputs or outputs mentioned above.
● Optional: 1 Modbus interface with:
– Output of gas concentration as cyclic data
– Alarm output, alarm classification
– Input for temperature and/or pressure data for compensation
● 1 Ethernet 10Base-T port, only for service and maintenance. Using Ethernet, the analyzer
supports the following software:
– LDSComm (PC software for service and maintenance engineers)
– SITRANS SL updater (PC software for service engineers)
Note
For the non-Ex version the junction box of the sensor connection cable kit is required
for permanent installation of an Ethernet cable.
WARNING
In hazardous environments, all electric cables may only be connected or
disconnected with the permission of the plant manager (hot work permit)!
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