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5
GF 9950-10 Six Channel Transmitter
2551-XX-11
Blind Magmeter
Black
Red
9950 S
3
L Inputs
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2
CH1
DC POWER
+V
FREQ
DATA
GND
X
No connection
White
Shield
Black
Red
White
9950 Frequency
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2
CH1
DC POWER
+V
FREQ
DATA
GND
X
No connection
Shield
3
4
Frequency
S L
3
3
4
Input Wiring for 2551 and 2552 sensors
• Either Frequency or Digital (S
3
L) may be used.
•
GF recommends con
fi
guring these sensors with the Digital (S
3
L) output to display
reverse
fl
ow (negative numbers).
• Input type is selected by choosing between “SENSOR FREQ” and "SENSOR S3L" in
the FLOW sensor type INPUT menu (Refer to page 11).
Frequency Output Technical
Notes (2551 & 2552):
• The frequency output will
be displayed as positive
fl
ow regardless of the
fl
ow direction.
• 5 VDC power required by
the 2551 & 2552 is supplied
by the 9950. No additional
power is required.
• Connect the silver wire
(shield) to earth ground
in case of EMI noise
interference.
2552 Technical Notes:
• The 2552 outputs an open
collector frequency signal that
can be connected to the 9950.
• Route sensor cable away
from AC power lines.
• Connect the silver (shield)
wire to earth ground in case
of EMI noise interference.
2551 Technical Notes:
• When the blue jumper
illustrated here is
placed over both pins,
the 2551-XX-11 (Blind
Magmeter) outputs an
open collector frequency
signal. When the jumper
is removed (or placed
over one pin for storage)
the 2551-XX-11 outputs a
digital (S
3
L)
signal (recommended).
Sensor Wiring
Start-Up Guide
Only in case of EMI interference.
Refer to Frequency Output Technical Notes (2551 & 2552) at right.
2552
Black
Brown
White
9950 S
3
L Inputs
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2
CH1
DC POWER
+V
FREQ
DATA
GND
Black
Brown
White
9950 Frequency
+V
FREQ
DATA
GND
+V
FREQ
DATA
GND
Loop1+
Loop1–
Loop2+
Loop2–
PWR+
PWR–
CH2
CH1
DC POWER
X
No
connection
+V
FREQ
DATA
GND
Blue
Blue
X
No connection
Shield
Shield
Sensor
Terminal
Signal
1
Black (+V)
2
Red (S3L/Freq)
3
White (GND)
4
Not Used