Fujimoto Fuji Differential Pressure Transmitter FKK 4 - Manual (Page 67)

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BUILT-IN ARRESTER
An arrester is used to protect a transmitter or receiver from an abnormal voltage such as lightning
surges induced into signal lines. A built-in type arrester is mounted behind the terminal unit. A
nameplate marked “with arrester” is attached to the terminal unit of transmitter with a built-in
arrester.
Since transmitter and arrester groundings are internally connected together, user have only to
connect the external grounding terminals to ground.
Grounding terminal must be used, in case of the explosionproof or intrinsic safety type
transmitter.
A1
1. Grounding resistance should be 100W or less.
2. Avoid common grounding with a lightning rod.
Important
The built-in arrester should be used in combination with panel mounting type arrester (type PXC)
for distributor protection.
+
–
Transmitter
(with arrester)
Panel mounting
type arrester
PXC
Distributor
E
1
5
2
6 E 1+
1–
PWM
FCX-C series transmitter
External grounding terminal
External grounding terminal
Grounding terminal
CK+
CK–
+
–
General
Installation
Grounding