GF Signet 8900 Multi-Parameter Controller - Manual (Page 5)

5 Signet 8900 Multi-Parameter
2.2 System Overview
The most basic 8900 system consists of a Base Unit, an I/O Module and a Power Module. Outputs and relays are optional.
Each item is ordered separately.
See Section 3 Installation & Basic Functionality, and Ordering Information for more details.
a. Base Unit, required.
b. Rear panel shown installed with shields in place for the optional modules. No plug-in modules are installed in this view.
c. Slot for the required I/O Module. Choose one (1) for either two or four or six input channels. This module is also used for optional
Analog Outputs 1 & 2.
d. Slot for the required Power Module. Choose one (1) to power the unit with either universal AC line voltage or 12 to 24 VDC.
e. Slot for an optional Output Module. Choose Analog Outputs 3 & 4 or neither.
f.
Slot for an optional Relay Module. Choose Relays 1 & 2, or not.
g. Slot for another optional Relay Module. Choose Relays 3 & 4, or not.
h. External Relay Modules connect via digital (S
3 L) to the I/O Module and are optional.
i. Plug-in modules slide into the base unit on rails and are then held securely in place by the rear panel. Changes and upgrades can
be made in the fi eld at any time.
OUT
2
OUT
1
SENSOR INPUTS
POER
COMM POR
T/
OUT
4
OUT
3
RELA
4
RELA
3
RELA
2
RELA
1
c
d
h
e
g
b
f
i
a
Multi-Parameter
Controller
C1 2.50 µS/cm
F2 58.43 GPM
Relay 1 Relay 2
ENTER