Appendix A
A.1 I/O Connections and Wiring
SITRANS FUH1010 Quick Start
Operating Instructions (Compact), 12/2008, CQO:QSG010 Revision A
41
Table A- 3 FUH1010 Input/Output Wiring (TB2)
Pin# Signal Function Description
11 Tx RS-232 Transmit
12 RTS RS-232 Request to
Send
13 DTR RS-232 Data Terminal
Ready
14 Rx RS-232 Receive
15 CTS RS-232 Clear to Send
16 GND Ground
Standard RS-
232 Signals
Standard RS-232
Communication Port
17 D1 Input Digital Input CH.1 Freeze Totalizer CH.1
18 D1 Return Digital Return Return
19 D2 Input Digital Input CH.2 Reset Totalizer CH.2
20 D2 Return Digital Return
Isolated Digital
Command
Lines
Return
5
5
9F
9F
7%
7[
576
'75
5[
&76
*1'
˖
˖
① Flowmeter ④ D2 Input
② D1 Input ⑤ D2 Return
③ D1 Return ⑥ Barrier
Isolated Digital Inputs
Vc: 2VDC (min) to 12 VDC (max)
For Vc = 5 VDC to 12 VDC use:
R= 2.4K ohms, 0.1 Watt (min)
For Vc less than 5 VDC select:
R to acheive I = 1.1mA (min)
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