Earth Ground
Drain wires here
Diagnostic Connector
SI 3
CI 3
SI 1
CI 1
Ground
CI 4
SI 4
Fr
om CCC
24 VAC
24 VAC
To
F
irs
t C
I
Fr
om
Transformer
Telephone
CI 2
SI 2
Pro-C
RUN
RAIN SENSOR
BYPASS
ACTIVE
SET CURRENT DATE / TIME
SET WATERING START TIMES
SET DAYS TO WATER
SET STATION RUN TIMES
SYSTEM OFF
MANUAL – ALL STATIONS
SET PUMP OPERATION
MANUAL – SINGLE
CI 4
SI 4
AC
SI 1
CI 1
REM
To SmartPort
SI 3
CI 3
Ground
SEN
SI 2
CI 2
From
Transformer
24 VAC
24 VAC
To
C
on
tr
olle
r
SEN
AC
Sensor 1
Sensor 2
Sensor 3
Sensor
Common
Fr
om
S
I
or
P
re
vi
ou
s
CI
To
N
ex
t
CI
Fr
om
S
en
so
rs
IMMS
Controller
Interface
Earth Ground
Drain wires here
™�
POWER
5
IMMS-SI can have two types of
communications from the computer.
IMMS-SI-HW has hardwired input over
GCBL cable, from a CCC installed at the
computer. IMMS-SI-MOD connects to a
standard telephone jack with a dedicated
analog line (must have dial tone).
1. Route GCBL cable from CCC through low-voltage conduit into SI.
2. Strip black outer jacket and excess foil shield back approximately
2" (50 mm).
3. Strip approximately
3
⁄
16
" (4.5 mm) from each individual wire and
connect to top half of communications terminals, in area labeled
“From CCC”, observing color codes.
IMMS-SI COMMUNICATIONS CONNECTIONS ..................................................................
HARDWIRE CONNECTION (IMMS-SI-HW) .........................................................................
4. Connect bare silver ground wire in GCBL to ground lug at earth
ground symbol.
5. Connect bare copper 10 AWG (2.5 mm dia.) wire from ground lug to
proper earth ground (recommended impedance 10 Ohms or less).
