Signet 9900 Operating Instructions Manual page 13

Sensor Wiring
Wiring for:
2551-XX-11
Blind Magmeter
Black
Red
White
Shield
Input Wiring for 2551 and 2552 sensors
• Either Frequency or Digital (S
• Signet recommends confi guring these sensors with the Digital (S
because it is more accurate and will also 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 (see page 32).
• Loop Power cannot be used to power these sensors.
Wiring for:
2552
Black
Brown
White
Blue
Shield
Only in case of EMI interference.
See Frequency Output Technical
Notes (2551 & 2552) at right
L) may be used.
3
9900 S 3 L Inputs
Black
Brown
White
Shield
Frequency
4
3
3
S L
L) output
3
Frequency
No
X
Blue
connection
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
4
(S L) signal (recommended).
3
3
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 9900. No additional
power is required.
• Connect the silver wire
(shield) to earth ground
in case of EMI noise
interference.
• If EMI noise interference
continues, disconnect silver
wire (shield) from 9900
2552 Technical Notes:
• The 2552 outputs an open
collector frequency signal that
can be connected to the 9900.
9900 Transmitter 13