‡ SIGNET 8550 ProcessPro™ Flow Transmitter

Features
• Permanent &
resettable totalizers
3-8550-X (FIELD) 3-8550-XP (PANEL) • Scaleable outputs
• Relay options
• Mounting versatility
• Simulate function
• 2 x 16 character
dot matrix LCD
• Chemical resistant
enclosure and self-
healing window
• Large pushbuttons
• Clearly marked
terminal labels

Application
• Flow control and
monitoring
• Filtration or softener
regeneration
• Effluent totalization
• Pump protection
Description • Feed pump pulsing
The +GF+ SIGNET 8550 Flow Transmit- process control, two packaging options • Ratio control
ter is an advanced solution that converts for integral/pipe mount or panel • Water distribution
the signal from all +GF+ SIGNET flow installation, and scalability for virtually • Leak detection
sensors into a 4 to 20 mA signal for long any flow range or engineering unit.
distance transmission, and offers the State-of-the-art electronic design
unique feature of dual input and output ensures long-term reliability, signal
capability. Configuration flexibility is stability, and simple user setup and
maximized with two optional relays for operation.

Technical Features
Mounting Version Part No. Wire Power Sensor 4 to 20 mA Open Collector/
Input Output Relay

Field 2/4 non-powered and 1 O.C. Hi, Lo, Pulse

3-8550-1 1 1
powered sensors Freq or Off
4 non-powered and 2 Relays Hi, Lo,
3-8550-2 powered sensors 1 1 Pulse or Off
2
2/4 non-powered and Sensor 1, 2 O.C.’s Hi, Lo, Pulse
3-8550-3 2
powered sensors Sensor 2 Freq or Off
or delta Flow
Panel 2/4 non-powered and 1 O.C. Hi, Lo, Pulse
3-8550-1P powered sensors 1 1
Freq or Off
4 non-powered and 2 Relays Hi, Lo,
3-8550-2P powered sensors 1 1 Pulse or Off
2
2/4 non-powered and Sensor 1, 2 O.C.’s Hi, Lo, Pulse
3-8550-3P 2
powered sensors Sensor 2 Freq or Off
or delta Flow

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 ‡ SIGNET
Dimensions

Flow Sensors
Flow Instrumentation
Installation
The transmitter is available in a panel mount or a field version. The field version is mounted to the sensor using
the integral mount kit (3-8051) or you may select the universal mount kit (3-8050) to mount the transmitter on a
surface near the sensor.

1 . Panel Mount 2. Integral Mount 3. Universal Mount

Analytical Sensors
3-8550-XP 3-8051Kit 3-8550-X Transmitter

3-8050 Kit

Analytical Instrumentation
All panel mount transmitters The Integral Mount Kit (3-8051) can The Universal Mount Kit
(3-8550-XP) include a mounting be ordered separately and in- (3-8050) can be ordered separately
bracket and gasket for a NEMA 4X cludes a conduit base, locking ring, and includes a conduit base,
watertight panel installation. Panel and integral adapter for mounting locking ring, and universal adapter
mount transmitters fit into a stan- the transmitter and sensor directly for mounting the transmitter on a
dard 1/4 DIN panel cutout. in a pipe. pipe, wall, or other stationary
surface.

Fittings
Temp/Pressure Graphs
Technical Reference

www.gfsignet.com 47
Rear Terminal View
Relay 2
10 (NO)
Relay 2
9 (COM)
System Pwr System Pwr Relay 2
4 Loop - 4 Loop - 8 (NC)
System Pwr Sensr Gnd System Pwr Relay 1 Sensr Gnd
3 Loop + 6 Output - 9 (SHIELD) 3 Loop + 7 (NO) 13 (SHIELD)
AUX Sensr IN AUX Relay 1 Sensr IN
2 Power - 8 (RED) 2 Power - 6 (COM) 12 (RED)
AUX Sensr V+ AUX Relay 1 Sensr V+
1 Power + 5 Output + 7 (BLACK) 1 Power + 5 (NC) 11 (BLACK)

3. terminal 8550-1 3. terminal 8550-2

Loop 2- Snsr 2 Gnd

6 10 Output 2- 16 (SHIELD)
Loop 2+ Snsr 2 IN
5 15 (RED)
System Pwr Snsr 2 V+
4 Loop - 9 Output 2+ 14 (BLACK)
System Pwr Snsr 1 Gnd
3 Loop + 8 Output 1- 13 (SHIELD)
AUX Snsr 1 IN
2 Power - 12 (RED)
AUX Snsr 1 V+
1 Power + 7 Output 1+ 11 (BLACK)

3. terminal 8550-3

Technical Data
General Electrical
Compatibility: Power:
+GF+ SIGNET Flow Sensors with frequency • 12 to 24 VDC ± 10%, regulated
outputs (-1) 61 mA max.; (-2) 200 mA max.; (-3) 122 mA max.
Accuracy: ± 0.5% of reading @ 25°C Sensor Input:
Enclosure: • Range: 0.5 to 1500 Hz
• Rating: NEMA 4X/IP65 front • Sensor power:
• Case: PBT 2-wire: 1.5 mA @ 5 VDC ± 1%
• Panel Case Gasket: Neoprene 3 or 4 wire: 20 mA @ 5 VDC ± 1%
• Window: Polyurethane coated polycarbonate • Optically isolated from current loop
• Keypad: • Short circuit protected
Sealed 4-key silicone rubber Current output:
• Weight: Approx. 325g (12 oz.) • 4 to 20 mA, isolated, fully adjustable and reversible
Display: • Max loop impedance:
• Alphanumeric 2 x 16 LCD 50Ω max. @ 12 V,
• Update rate: 1 second 325Ω max. @ 18 V,
• Contrast: User selected, 5 levels 600Ω max. @ 24 V
• Update rate: 100 ms
Environmental • Accuracy: ± 0.03 mA
Operating temperature: Relay output:
-10 to 70°C (14 to 158°F) • Mechanical SPDT contacts: Hi, Lo, Pulse, Off
Storage temperature: • Maximum voltage rating: 5 A @ 30 VDC, 5 A @
-15 to 80°C (5 to 176°F) 250 VAC resistive load
Relative humidity: • Hysteresis: User adjustable
0 to 95%, non-condensing • Max 300 pulses/min.
Open-collector output: Hi, Lo, Pulse, Off
Standards and Approvals • Open-collector, optically isolated,
• CSA, CE, UL listed 50 mA max. sink, 30 VDC max.
• Manufactured under ISO 9001 pull-up voltage.
• Max 300 pulses/min.

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 ‡ SIGNET
Ordering Information
Mfr. Part No. Code Description
3-8550-1 159 000 047 Flow transmitter, Field mount
3-8550-1P 159 000 048 Flow transmitter, Panel mount
3-8550-2 159 000 049 Flow transmitter, Field mount with relays
3-8550-2P 159 000 050 Flow transmitter, Panel mount with relays
3-8550-3 159 000 051 Flow transmitter, Field mount with dual input/output
3-8550-3P 159 000 052 Flow transmitter, Panel mount with dual input/output

Flow Sensors
Accessories
Mfr. Part No Code Description
3-8050 159 000 184 Universal mounting kit
3-8050.395 159 000 186 Transmitter NEMA 4X cover

Flow Instrumentation
3-8051 159 000 187 Flow Integral Mnt NPT
3-8050.396 159 000 617 RC Filter kit (for relay use)
3-8050.392 159 000 640 Model 200 retro-fit adapter
3-0000.596 159 000 641 Heavy duty wall mount bracket

Engineering Specifications
• The transmitter shall meet appropriate CE, CSA & UL standards.

Analytical Sensors
• The transmitter shall be manufactured under ISO 9001 certified processes.
• The transmitter shall be field or panel mountable.
• The transmitter shall have flow rate and dual totalization capability.
• The display units shall be fully scaleable.
• The device shall meet NEMA 4X and IP65 standards.
• The operating voltage shall be 12 to 24 VDC.
• The transmitter shall have a 4 to 20 mA output with an open collector output, 5 to 30 VDC or a 4 to 20 mA

Analytical Instrumentation
output with 2 relays, or dual 4 to 20 mA output with dual open collector with delta capability.
• The transmitter shall have simulate capability.
• The transmitter shall be +GF+SIGNET, Model 8550 Flow Transmitter.

Fittings
Temp/Pressure Graphs
Technical Reference

www.gfsignet.com 49