Gf Signet 3-8900-1-4011-4021 | Weatherproof Nema-4x Ip65 | Multi-variable Controllers | Controlsystemsusa
Process Control Instrumentation, Field Devices and Industrial Automation

GF SIGNET   3-8900-1-4011-4021

GF SIGNET 3-8900-1-4011-4021
GF Signet 8900 Multi-Variable Controller for Flow, pH, ORP, Conductivity, Pressure, Level or Temperature Sensors. Accepts two or four input channels. Up to 4 analog outputs and 8 relay outputs. 1/4 DIN enclosure. NEMA 4X/IP65. UL Listed.

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I/O Modules
* Passive outputs require an external power source
Power Modules
Relay Modules
Output Modules

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The Signet 8900 Multi-Parameter Controller takes the concept of modularity to the extreme. Each 8900 is field commissioned with the users specified combination of inputs, outputs, and relays using simple-to-install modular boards into the base unit. Configure the system by selecting either two, four, or six input channels which accepts any of the Signet sensors listed below, and/or other manufacturers sensors via a 4 to 20 mA signal converter (Signet Model 8058). To complete your unit, choose a power module with universal AC line voltage or 12 to 24 VDC 10%, regulated.

If more features are needed, analog output and relay modules are available and easily installed. Plus, the 8900 will support four additional relays via an external relay module. There are other notable features that the 8900 offers. For instance, digital input to the 8900 enables longer cable runs and simplified wiring with minimal noise interference. Advanced relay logic allows users to select up to 3 measurement sources to trigger 1 relay. Derived measurements include difference, sum, ratio, percent recovery, percent rejection, percent passage and BTU. The menu system can be programmed to display in multi-languages including English, German, French, Spanish, Italian, and Portuguese.

  • Measures Flow, pH, ORP, Conductivity, Pressure, Level and Temperature
  • Multi-language display
  • 1⁄4 DIN enclosure
  • Up to 4 analog outputs
  • Up to 8 relays
  • 12 to 24 VDC or 100 to 240 VAC 10%, regulated power
  • Digital communication allows for extended cable lengths and easy wiring
  • Accepts 3rd party 4 to 20 mA output devices when used with 8058 signal converter
  • Available with 2 to 6 channels
  • Simultaneous BTU Calculations with Heating & Cooling Totalizers per calculation
  • RO/DI System Control
  • Media Filtration
  • Pure Water Production
  • Demineralizers
  • Chemical Processing
  • Metal & Plastics Finishing
  • Fume Scrubbers
  • Proportional Chemical Addition
  • Cooling Tower & Boiler Protection
  • Wastewater Treatment
  • Aquatic Animal Life Support Systems
  • Rinse Tank

Compatibility Modular (completely fi eld-commissionable)
No. of Input Channels 2, 4, or 6
Compatible Sensors See System Overview
Input Signal Types Digital (S3L): Serial ASCII, TTL level 9600 bps
Frequency: 0.5% of reading
Measurement Types Flow, pH, ORP, Conductivity/Resistivity, Pressure, Temperature, Level, or 3 rd party devices with a 4 to 20 mA output
Derived Measurements Sum, diff erence, ratio, % recovery, % reject, % passage, power (BTU)
No. of Relays Supported Available: 2, 4, 6 or 8 (8 dry-contact or 4 solid state and 4 dry- contact)
No. of Analog Outputs Available in pairs: 2 or 4 (active and/or passive 4 to 20 mA); and/or 2 (0 to 5/10 VDC)
Enclosure and Display
Enclosure Rating NEMA 4X/IP65 (front face only)
Case Material PBT
Panel Gasket Silicone Sponge
Window Self-healing polyurethane-coated polycarbonate
Keypad 4-buttons, highly tactile and audible injection-molded silicone rubber seal
Display Alphanumeric 2 x 16 back-lit LCD
Update Rate 1 second
Accuracy Sensor dependent
LCD Contrast 4 settings
Languages Available English, French, Spanish, German, Italian and Portuguese
Display Ranges (see sensor specifications for actual measurement limits)
pH -2.00 to 15.00 pH
pH Temperature -40 C to 150 C (-40 F to 302 F)
ORP -9999 to +9999 mV
Flow Rate 0.0000 to 999999 units per second, minute, hour or day
Totalizer 0.00 to 99999999 units
Conductivity 0.0000 to 999999 μS, mS, PPM & PPB (TDS), kΩ, MΩ
Conductivity Temperature -99.9 C to 250 C (-148 F to 482 F)
Temperature -99.9 C to 999.9 C (-148 F to 999.9 F)
Pressure -99.99 to 9999 psi, kPa, bar
Level -99999 to 99999 m, cm, ft, in., %
Volume -99999 to 999999 m 3 , ft 3 , in 3 , cm 3 , gal, L, kg, lb, %
Other (4 to 20 mA) -99999 to 999999 user selectable units
Ambient Operating Temperature Backlit LCD -10 C to 55 C (14 F to 131 F)
Storage Temperature -15 C to 80 C (5 F to 176 F)
Relative Humidity 0 to 95%, non-condensing
Maximum Altitude 2,000 m (6,560 ft)
4,000 m (13,123 ft); use only DC power supply and, if applicable, solid state relays to maintain UL safety standard up to this altitude
Universal AC 100 to 240 VAC +/-10%, regulated 50-60 Hz, 24 VA max.
DC 12 to 24 VDC, +/-10%, regulated recommended, 7 Watts max.
Output Power to Sensors 5 VDC up to 40 mA total
Terminal type Screw-clamp, removable via plug-in modules
Analog Outputs (via I/O Modules and Output Modules) All analog outputs are freely assignable to any channel.
4 to 20 mA Output Endpoints are adjustable and reversible
Minimum Default 4.0 mA; user adjustable from 3.8 to 5.0 mA
Maximum Default 20.00 mA; user adjustable from 19.0 to 21.0 mA
Test Mode Produces an adjustable 4 to 20 mA signal for functional verifi cation of each output circuit
Isolation Up to 48 VAC/DC
Error Condition 22.1 mA (default state when output source not confi gured)
Update Rate 100 ms
Accuracy +/-32 μA over entire operating temperature range
Passive 4 to 20 mA (External Power required) Voltage: 12 to 24 VDC, +/-10%, regulated
Max. Impedance: 250 Ω @ 12 VDC / 500 Ω @ 18 VDC / 750 Ω @ 24 VDC
Active 4 to 20 mA (Internally Loop Powered) Max. Impedance: 750 Ω
0 to 5/10 VDC Output Endpoints are adjustable and reversible
Output Range 0 to 5 VDC or 0 to 10 VDC, software selectable
Minimum Default 0 VDC; user programmable from 0 to 0.5 VDC
Maximum Default 5 VDC; user programmable from 4.5 to 5.5 VDC, or 9.5 to 10.5 VDC
Output Load 10 kΩ minimum
Test Mode Produces an adjustable signal for functional verifi cation of each output circuit
Isolation Up to 48 VAC/DC
Error Condition 0 VDC (default state when output source not confi gured)
Update Rate 100 mS
Accuracy +/-20 mV over entire operating temperature range
Resolution 5 mV
Power Supply Rejection 0.5 mV/V
Relay Modules All relays are freely assignable to any channel.
Internal relay modes of operation Off , Low, High, Window, Proportional Pulse, Pulse Width Modulation, USP, Volumetric, Pulse, Totalizer Volume, Advanced, % Rejection, % Recovery, % Passage
External relay modes of operation Off , Low, High, Window, USP, Totalizer Volume, Advanced, % Rejection, % Recovery, % Passage
Hysteresis User adjustable
Time Delay 0 to 6400 seconds
Advanced Relay Use AND/OR logic along with relay sources to trigger a relay. High/Low modes available for each of the 3 sources
Solid State Relays Non-mechanical switches
Normally Open/Closed Operation Software selectable
Relay Modules continued
Maximum Voltage Rating 30 VDC or 42 VAC p-p
Current Rating 50 mA DC or 50 mA AC RMS
On-state Impedance 30 Ω or less
Off -state Leakage 400 nA or less, AC or DC
Isolation Up to 48 VAC/DC
Transient Protection Embedded, up to 48 V over-voltage
Dry-contact Relays Mechanical contacts
Form C
Maximum Pulse Rate 600 pulses/min. (volumetric pulse & PWM modes)
400 pulses/min. (prop. pulse mode)
Maximum Voltage Rating 30 VDC or 250 VAC
Current Rating 5 A
Shipping Weight
Base Unit 1.00 kg (2.25 lb)
Power Module 0.12 kg (0.25 lb)
I/O Module 0.12 kg (0.25 lb)
Output Module 0.12 kg (0.25 lb)
Relay Module 0.12 kg (0.25 lb)
Standards and Approvals CE, UL, FCC
RoHS compliant, China RoHS
Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental
Management and OHSAS 18001 for Occupational Health and Safety

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