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Setup, Network and Communication Manual ESTM / ESTM-L
17-88C1-*
11-88C1-7D0002
Notice Technical data subject to change without notice.
No claims for damage arising from alternations, errors or misprints shall be allowed.
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4.8.2 Limiter
The Limiter option is only available with an ESTM-L.
The limiter of the ESTM-L follows the requirements for Controlled
design of the IEC/IEEE/EN 60079
–30–1.
SIL II Limiter:
The Limiter value is set by an coding element. Coding element will
be connected to a marked terminal in the enclosure. Only use
Original BARTEC coding element. For detailed information see
Installation manual.
To reset the limiter see table below.
The limiter is not adjustable by software to meet the Requirements
of SIL 2
The function “pre alarm limiter sensor” is just an
adjustable Alarm value. It will not trip the Limiter. Only an
alarm will be send by Modbus.
Function Description action / - effects on / valid values ranges
Limiter Set point Returns coding element value of limiter. - Control relays and Limiter relays
- -
- fault indication: 999
- see: 4.8.5 Alarm Status
Limiter Actual Value Returns measured temperature limiter Sensor.
Limiter Tripped Trip indication of the limiter:
The limiter can be tripped on several reasons:
“Limiter
Actual Value”
higher than
“Limiter Actual Value”
Sensor limiter high or low fault
Coding element high or low fault
“Internal power circuit hotspot” exited
- open failure contact
- alarm LED local display
- Modbus Input Register 70.1 (faults)
Alarm Status
Reset condition If the limiter is triggered and all condition to reset
are given it will be indicated here
Reset conditions:
“Limiter
Actual Value”
lower than
“Limiter Actual Value”-5K
No Sensor limiter high or low fault
No Coding element high or low fault
“Internal power circuit hotspot” not exited
No remote maintenance active
- Modbus Input Register 72.12 (status)
Pre alarm limiter Sensor Is an Adjustable warning level, it can be used as
an warning level before the limiter trips hard.
If measured Temp @ Limiter sensor 1
“Limiter
Actual Value
” is higher than “Pre alarm limiter
Sensor” Then alarm the corresponding flag will
activate.
- Modbus Input Register 72.5 (status)
555°C / 1031°F = alarm off