Yokogawa EXAxt PH450 4-Wire Analyzer for pH and ORP - Manual (Page 13)

5
IM 12B07C05-01E
3
INSTALLATION
AND
WIRING
3-1. Installation and dimensions
3-1-1. Installation site
The EXAxt 450 converter is weatherproof and
can be installed inside or outside. It should,
however, be installed as close as possible to
the sensor to avoid long cable runs between
sensor and converter. In any case, the cable
length should not exceed 50 metres (162 feet).
Select an installation site where:
• Mechanical vibrations and shocks are
negligible
• No relay/power switches are in the direct
environment
• Access is possible to the cable glands
(see figure 3-1)
• The converter is not mounted in direct
sunlight or severe weather conditions
• Maintenance procedures are possible
(avoiding corrosive environments)
The ambient temperature and humidity of
the installation environment must be within
the limits of the instrument specifications.
(See chapter 2).
3-1-2. Mounting methods
Refer to figures 3-2 and 3-3. Note that the
EXAxt converter has universal mounting capa-
bilities:
• Panel mounting using optional brackets
• Surface mounting on a plate (using bolts
from the back)
• Wall mounting on a bracket (for example,
on a solid wall)
• Pipe mounting using a bracket on a
horizontal or vertical pipe
Size nominal 50A
3. INSTALLATION AND WIRING
Figure 3-1. Housing dimensions and layout of glands
220(8.66") 184(7.2")
72(2.8")
A
D E F
B C
A : For output signal
B : For contact input
C : For sensor cable
D : For contact output (S1 and S2)
E : For contact output (S3 and S4)
F : For power supply
Adapter
49
(1.93 " )
 G1/2 screw (/AFTG),  1/2 NPT screw (/ANSI)
 M20 screw (/AM20)
Approx.
55(2.2 " )
144(5.67")
144(5.67")
20
(0.79")
20
(0.79")
121.5(4.78")
24.5(1")
 Adapter for Coduit Work (optional)
(option code : / AFTG, / ANSI, / AM20)
M20 cable gland
(When shipped, not installed)
Grounding terminal (M4 screw)
 Hood (Option code: /H5, some cutout on the left side cover)
Unit: mm (inch)