Figure A-5 7Me39400Al03 Main Board I/O Wiring; Table A-5 Open Collector User Resistor Recommendations - Siemens SITRANS F Series Quick Start Manual

Figure A-5
Table A-5 Open Collector User Resistor Recommendations
User Supply
Voltage (VDC)
5
9
12
18
24
28
36
Note
TB2-9 and TB2-11 are Open Collector Outputs that require external pull-up resistors for
operation. See table above for External Supply Voltage and suggested resistor value and
ratings. Maximum current into the transistor is 100 mA. Maximum Voltage is +36 VDC.
Negative voltages with respect to ground will permanently damage transistors.
FUT1010 IP65 NEMA 4X & IP66 NEMA 7 Liquid Quick Start
Operating Instructions, 6/2010, A5E02639182A Revision 02
7ME39400AL03 Main Board I/O Wiring
External Resistor
(Ohms)
270
510
680
1000
1500
1800
2400
CAUTION
Expected
Current Draw (mA)
18.5
17.6
17.6
18
16
15.5
15
Appendix A
A.1 I/O Connections and Wiring
Recommended Resistor
Wattage (Watts)
1/2
1/2
1/2
3/4
1
1 1/4
1 1/4
41