Electrical interlock
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Could some expert help me figure out what signals ZXSL10101 and ZXSH10101 represent? Where was it sent from? Does SS1001 interlock to shut off this isolation valve XV10101?
ZXSL10101 and ZXSH10101 are signals in electrical interlocking; their specific meanings depend on the particular situation. Generally, these signals can be digital or analog signals, used to control the on/off operation or functioning of devices such as valves and pumps. These signals are generally sent by control systems such as PLCs and DCSs. In some cases, it may also be generated by field instruments, such as pressure transmitters, temperature transmitters, etc. As for whether the SS1001 interlock shutdown will shut off valve XV10101, it requires analysis and judgment based on the specific safety logic, and a simple answer cannot be given. .
ZXSL10101 and ZXSH10101 are the low-level and high-level switch signals for the ZX10101 valve (ZX refers to valves in the SIS system, S denotes switch signals, and L/H indicates low level/high level). These switch signals are sent to SS1001 where they are converted into logical signals, which are then sent to the DCS to trigger alarms for the low/high level of ZX10101 (ZXAL10101 and ZXAH10101; A stands for alarm, while L/H are suffixes indicating low level/high level). The operating signal of valve ZX10101 cannot be seen in the diagram.
The open and closed status of the electric ball valve is connected to the DCS display (for alarms) via a relay.
What does this SS mean?
It only mentions valve position display and alarms; it doesn’t say who is responsible for interlocks!
This diagram can only prove that there is a relationship between them; the specifics have to be checked in the legend and the interlock logic diagram