Toshiba Tohsiba Electromagnetic Flowmeter Converter L5232 - Manual (Page 31)

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5.6 Cautionary Notes on Replacing Converter
5.6.1 Replacing the LF230 Converter
The following precautions must be taken to replace the conventional type LF230 with LF232.
Installation
• Since the hole diameter and pitch for mounting fitting, and the dimensions of the LF232 converter
main unit are the same as those of the LF230 converter, it is possible to replace the converter without
changing the mounting panel, installation space, etc.
• The operation switches of the LF232 are infrared switches. If direct sunlight hits the display and the
operation section or if there is something nearby that easily reflects light, this kind of light becomes
disturbance light and the switch operation may not work correctly. Be careful about the installation
location and angle, or take measures such as providing a sunshade or shield plate so that disturbance
light does not hit the operation section directly.
Wiring
• The positions of the LF232 cable ports are the same as those of the LF230.
• The specifications of the cable ports differ as shown in the table below.
Table 5.2 Comparison of Cable Port Specifications
LF230 LF232
Ports on the housing M27 fine pitch thread
Depth 0.433 inch (11mm) G1/2
Depth 0.433 inch (11mm)
Material Stainless steel Nylon resin Attached cable
connection
specifications
Waterproof grade IP67 IP67
Appropriate cable
diameter Excitation and DI/DO cables
φ0.433−0.512 inch
(
φ11−13mm)
Other cables
φ0.394−0.472 inch
(
φ10−12mm)
φ0.433−0.512 inch
(
φ11−13mm)
Conduit connection port R (PT) 1/2 male thread Not provided
Blind plate (seal plate) Waterproof blind plate
attached Dustproof blind plate attached
* (Note)
Note: The blind plate is not a waterproof type. If it is necessary to install the converter where waterproof
structure is needed, take waterproof measures for unused cable ports such as using sealing plugs sold on
the market.
• Since the terminal block specification of the LF232 is M4 screws, the same as that of the LF230, it is
possible to connect the cables without changing the cable terminals.