Table A- 5 Open Collector User Resistor Recommendations; Figure A-5 7Me39400Al04 Main Board I/O Wiring - Siemens SITRANS F FUT1010 Instructions De Service

Appendix A
A.1 I/O Connections and Wiring
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 for External Supply Voltage and suggested resistor value and ratings.
Maximum current into the transistor is 100mA. Maximum Voltage is +36 VDC.
NOTICE
Transistor Damage
Negative voltages with respect to ground will permanently damage transistors.
Use caution when applying power to circuit boards.
50
+5V
PG4
DPGEN_2-Ø2
2 4
TTL/CMOS
PG3
DPGEN_1-Ø2
1
+5V
PG2
DPGEN_2-Ø1
2 4
TTL/CMOS
PG1
DPGEN_1-Ø1
1
7ME39400AL04 Main Board I/O Wiring
External Resistor
(Ohms)
270
510
680
1000
1500
1800
2400
Expected
Current Draw (mA)
18.5
17.6
17.6
18
16
15.5
15
FUT1010 IP65 NEMA 4X & IP66 NEMA 7 Gas Quick Start
Operating Instructions, 1/2013, A5E02639183-AC
Recommended Resistor
Wattage (Watts)
1/2
1/2
1/2
3/4
1
1 1/4
1 1/4