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LF-Series Flowmeters: Sensor/Transmitter Installation 35
I/O Wiring – FM CIO Transmitters
I/O Wiring – FM AN I/O Wiring – FM FB and PAI/O Wiring – FM CIOSensor Wiring
Figure 7-5 Frequency output – Terminals 3 & 4 (Channel B) – Internal power
Figure 7-6 Frequency output – Terminals 3 & 4 (Channel B) – External power
Note: See Figure 7-13 for output voltage versus load resistance.
Counter
+
–
Output voltage level is +15 VDC ± 3%
00042
Note: See Figure 7-15 for recommended resistor versus supply voltage.
CAUTION
Excessive current will damage the transmitter.
Do not exceed 30 VDC input. Terminal current must be less than 500 mA.
Pull-up resistor
+
–
Counter
3–30 VDC
+
–
+
–
00042