PR 1720 Operation Manual Contents
Sartorius 3
Contents
1 DESCRIPTION ............................................................................................................................. 7
1.1 INTERFACES ............................................................................................................................................................8
1.1.1
Serial interfaces....................................................................................................................................................................... 8
1.1.2
Fieldbus interface.................................................................................................................................................................... 9
1.1.3
Analog output.......................................................................................................................................................................... 9
1.1.4
Digital interfaces..................................................................................................................................................................... 9
1.2 LIMITS ................................................................................................................................................................. 10
1.3 CONTROL SIGNALS ............................................................................................................................................... 10
1.4 REMOTE DISPLAY.................................................................................................................................................. 10
2 SAFETY HINTS, POWER CONNECTION ................................................................................11
2.1 INITIAL INSPECTION.............................................................................................................................................. 11
2.2 M
OUNTING POSITION........................................................................................................................................... 11
2.2.1
Housing in stainless steel (Version PR 1720/10 and -/11) ......................................................................................12
2.3 BEFORE COMMISSIONING..................................................................................................................................... 12
2.4 OPENING THE INSTRUMENT .................................................................................................................................. 12
2.5 SUPPLY VOLTAGES/MAINS CONNECTION ............................................................................................................... 13
2.5.1
24 VAC version PR 1720/01 and -/11 ............................................................................................................................13
2.6 MAINTENANCE..................................................................................................................................................... 14
2.6.1
Fuse............................................................................................................................................................................................14
2.6.2
Soldering..................................................................................................................................................................................14
2.7 REPAIR ................................................................................................................................................................ 15
2.7.1
For special attention............................................................................................................................................................15
2.7.2
Failure and excessive stress ...............................................................................................................................................15
2.8 DISPOSAL............................................................................................................................................................. 15
3 INSTALLATION .........................................................................................................................16
3.1 C
ONNECTIONS ..................................................................................................................................................... 16
3.2 C
ONNECTION OF 2 TO 8 LOAD CELLS VIA PR 6130 CABLE JUNCTION BOX ..........................................................18
3.2.1
Direct connection of 1 load cell ......................................................................................................................................18
3.3 CONNECTION OF 2 TO 4 LOAD CELLS WITH PR 1722 CONNECTION SUB-UNIT .................................................... 19
3.4 DIGITAL OUTPUTS ................................................................................................................................................. 20
3.5 D
IGITAL INPUTS....................................................................................................................................................20
3.6 A
NALOG OUTPUT..................................................................................................................................................21
3.7 OPERATOR/SERVICE INTERFACE RS232 ...............................................................................................................22
3.8 SERIAL (COMMUNICATION) INTERFACES............................................................................................................... 23
3.8.1
RS 232.......................................................................................................................................................................................24
3.8.2
Current loop............................................................................................................................................................................25
3.8.3
RS 422/485..............................................................................................................................................................................26
3.8.4
RS422/485 BUS......................................................................................................................................................................27
3.8.5
RS 422/485 BUS 2- wire.....................................................................................................................................................28
3.8.6
Solder links on the interface modules...........................................................................................................................29
3.9 PR 1721
FIELDBUS INTERFACE ...........................................................................................................................30
3.9.1
PR1721/11 Profibus-DP (option)......................................................................................................................................31
3.9.2
PR1721/12 Interbus-S (Option)........................................................................................................................................32
3.9.3
PR1721/14 DeviceNet Interface.......................................................................................................................................33
4 SURVEY/FUNCTION.................................................................................................................35
4.1 FUNCTION BLOCKS ............................................................................................................................................... 35
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