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8900 Multi-Parameter Controller
‡ SIGNET
Description
The 8900 Multi-Parameter Controller takes the
concept of modularity to the extreme. Two
base units, one with back-lit LCD and the
other with vacuum fluorescent display can be
configured by the user in the field. Ultimate
flexibility is achieved via plug-in modules for
either two or four input channels, universal AC
line voltage or 12 to 24 VDC operation, up to
four analog outputs, and up to four relays. The
controller will support up to four additional
relays, for a total of eight, by way of external
System Features
a) 8900 Base Unit: Select back-lit LCD or
vacuum fluorescent display
b) I/O Module: Select 2 or 4 input channels
with or without analog outputs
c) Power Module: Select AC or DC operation
d) Relay Module (optional): Dry-contact or
solid state relays
e) Analog Output Module (optional): Active or
passive 4 to 20mA, or 0 to 5/10 VDC
f) Comm Module (optional): RS232 (pending)
Features
• Modular configurability
• Absolute input versatility
up to four channels
• 1/4 DIN enclosure
•S
3
L™ digital connectivity
for pH, ORP, conductivity,
level, temperature and
pressure
• Frequency input for
many flow sensor
options
• Derived measurements:
Difference, Sum, Ratio,
% Recovery, % Rejection,
% Passage
• Up to four analog
outputs
• Up to eight relays
• RS232 output (pending)
• Display options
• Plug-in terminals
• Multi-language display
(pending)
Applications
• 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
OUT 2 OUT 1
POWER
COMM PORT /
OUT 4 OUT 3
RELAY 2 RELAY 1
RELAY 4 RELAY 3
SENSOR INPUTS
a
b
d
e
f
c
8900
515
2210
525
2222
2536
2850
2540
7000
2541
2000
2350
2507
2550
2100
2450
2517
2750
7002
2750
Flow
Level
Temp.
Pressure
pH
ORP
Cond.
2450
Compatible Sensors
relay modules. Absolute input versatility
allows mixing and matching of up to four
sensors with S
3
L™ output including pH, ORP,
conductivity/resistivity, pressure, temperature,
and level. Two of the possible four input
channels may be used for any combination
of the many +GF+ SIGNET flow sensors with
frequency output. The table below indentifies
sensor models available for use with this
controller.
3-8900.099 (A - 2/03)
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