
2.4 Illustration and description of the round junction box
i.
2-wire distributing system:
i.
Two-wire distributing system
Labels on round junction box
Terminals on transmitter
INPUT terminals
Terminal
No.
OUTPUT terminals
(7202-RG-58)
(7202-F94009-BK)
Coaxial inner from sensor
1
Coaxial inner
GLASS
Shield (forbidden)
2
Shield (forbidden)
------
Coaxial shield from sensor
3
Coaxial shield
REF
Green wire from temp. probe
4
Green wire
SG
Red wire from temp. probe
5
Red wire
ATC
Alternative
6, 7
Alternative
------
(8-09-5)
Note:
It is necessary to make REF and SG
short-circuited as 2-wire distribution
system is applied (with a built-in
jumper between them).
w/o a temp. probe
Use coaxial shield wire 7202-RG-58
w/ a temp. probe
Use coaxial 4-core wire 7202-F94009-BK
Junction box
Temp. probe
Transparent
Shield
IN
OUT
Green
Red
pH/ORP
sensor
Transparent
Transparent
Shield
Shield
Gr
Gr
Red
Red
Black
6