5
Signet 2551 Display Magmeter
2551 Display Magmeters use a dual-sided electronics
module and dual conduit ports. Unused ports must be
sealed to protect the electronics from water damage.
1. The lower set of conduit ports provide access to the
wiring terminals for:
• Loop Power
•
Flow Output Signal (current loop, Digital (S
3
L),
frequency or Mirror Relay 1 output).
2. The upper set of conduit ports provide access to the
wiring terminals for:
• Relay output wiring
• Auxiliary power for relay coils and display backlight
3. The sensor is marked with a directional arrow to indicate
the direction identi
fi
ed as forward
fl
ow.
•
An adhesive decal is also provided that can be af
fi
xed
to the pipe to indicate the direction of forward
fl
ow.
•
Flow in the opposite direction from the arrow will be
identi
fi
ed as reverse
fl
ow on the display by a "-" symbol.
4. The terminals in the magmeter are designed to
accomodate 16 to 22 AWG conductors.
5. The display includes two LEDs that light when
Relay 1 or Relay 2 are activated.
•
All three relays can be monitored by scrolling to the
Relay Status display located in the View menu.
•
If the Language option has not been made, new
magmeters will always open with the Select Language
display.
Language
English >
6. The part number, serial number and output type are
identi
fi
ed on the electronics module.
Signet Magmeter
RELAY 1
RELAY 2
ENTER
420 GPM
123456.78 >
3.
Relay 1
Relay 2
NO1
NO2
NO3
NC1
NC2
NC3
C1
C2
C3
V+
V-
Relay 3
Aux Pwr
4.
5.
4
-2
0/fr
eq
ou
t
s/n 60504201234
60504201234
p/n 3-2551-11
3-2551-11
6.
4.
1
2
3
4
4 to 20 mA output
Digital (S
3
L) output
Frequency output
Mirror relay 1 output
1.
Relay output
Aux power
2.
Overview of Magmeter Display
2551 Magmeter
4.5-26.4
VDC
Relay 1
Relay 2
NO1
NO2
NO3
NC1
NC2
NC3
C1
C2
C3
Relay 3
V+
V-
+ VDC
- VDC
Aux Pwr
3
Frequency Out
Frequency ÷ 10 Out
(5 to 26.4 VDC)
**********************
Digital (S L) Out
(4.5 to 6.5 VDC)
1
2
3
4
Auxiliary Power for:
Display backlighting
Relay Coils
Ground
Signal
3-2551-21 and 3-2551-41 Magmeters may be programmed
in the OPTIONS menu to provide an open collector
FREQUENCY output.
• The maximum frequency output is 1000 Hz
(at 10 meters per second)
• If the Frequency ÷ 10 output is selected, the maximum
frequency is 100 Hz (at 10 meters per second).
• AUX PWR must be connected to power the display
backlighting and to power the relay coils if included.
Wiring to Frequency Output
1
2
3
4
5-24 VDC
Ground
Not used
Open Collector Out
2551 Magmeter
The 3-2551-21 and 3-2551-41 Magmeter can be con
fi
gured
in the OPTIONS menu to provide an Open Collector output
in lieu of the sensor signal provided by Frequency or Digital
(S
3
L) output selections. The Open Collector output can be
programmed via the Relay 1 menu.
Wiring to Mirror Relay 1 Output
