Rs 485 Interface; Applying The Measuring Voltage - Siemens SENTRON PAC3100 Manual

Commissioning

7.4 Applying the measuring voltage

Example
You want to measure the current using current transformers for 5000 A/5 A.
For this purpose, enter:
1. CT PRIMARY: 5000A
2. CT SECONDARY: 5A
Figure 7-10
7.3.4

RS 485 interface

The Modbus communication parameters have to be set on the device for initial startup of the
integral RS 485 interface.
Procedure
1. In the "SETTINGS" menu, call the "COMMUNICATION" entry:
<F4>
The display shows the currently valid settings.
2. Go to the communication settings that you want to change:
<F2>
3. Open edit mode of the communication setting:
<F4>
4. Set the desired value:
<F2>
5. Accept the value with:
<F4>
The value is permanently saved and becomes effective immediately. The display returns
to display mode.
6. Change other settings.
7. Return to one of the selection menus or to the measured values display:
<F1>
7.4 Applying the measuring voltage
The SENTRON PAC3100 is designed for measuring in systems with rated AC voltages up to
● 277 V phase-to-neutral and
● 480 V phase-to-phase.
60
Device setting "CURRENT INPUTS - CT PRIMARY?"
or <F3>
and <F3>
SENTRON PAC3100
Manual, 07/2009, A5E02385159B-01