STW Ex

1 Connection diagram

The connection is carried out via screw terminals.

File:Anschlussplan gesamt.PNG

2 Configuration

Navigation principle

File:Jumo SafetyM STB Navigation.jpg

Setup the following parameters.

2.1 Analog inputs

Analog inputs Connection Check the drawings and adjust accordingly => Two sensors for 2 seperate PT100 => Single PT100 2w for 1 PT100 jumpered to the second Input

File:Anschluss.PNG

Offset 1 Check the actual value with e.g. portable mearuing device and correct value by entering an offset => -999.9 to 999.9

File:Offset1.1.jpg

Offset 2 same value as offset 1 => -999.9 to 999.9

File:Offset2.1.jpg

2.2 Limiter/Monitor

Limiter/Monitor

Device Function => STW = auto reset enable

File:STB.jpg

Switching behavior => Max. alarm

File:Schaltverhalten.jpg

For BSF lines where we read the melt temperature: Limit value => ET site documentation

For HCU appliances: Find the limit value in the specific MFS document (or ask ESCIBN to find the value for you)

File:Grenzwert.jpg

Attention: This is a safety relevant parameter! Always confirm this value with the safety department!!!

Hyst. limit value => 3

File:Jumo adjustment limitermoni (1).jpg

Diff. limit val.
=> 5 if the two wire input sensor is jumped
=> 20 if two three wire input sensors are connected

File:Difflimitval.PNG

Diff. Hyst. => 3

File:Jumo adjustment limitermoni (2).jpg

2.3 Analog output

Analog output

Sacling start => 0

File:Skal. Anfang.jpg

Scaling end
=> Check ET site documentation
​=> copy the same value to WinCC Parameter Panel

File:Value.PNG

3 Troubleshooting

- If you only see >>>>>> on the display check the faults by pressing the Reset Button for a longer time. If there is a bell behind the alarm it is still active. Otherwise you have to press the Reset Button as long as the alarms are confirmed.

- If you see that only one PT100 is cabled (on 1-3) check the instructions. According to those you have to set two bridges the following way: 1-6 and 3-8.