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An arrester is used to protect a transmitter or receiver from an abnormal voltage such as light-
ning 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.
Installation
If surges are likely to appear on the loop 4 / 20 mA, for example because of lightning, it is advis-
able to install a built-in arrester should be used in combination with panel mounting type arrester
(type PXC) for distributor protection
Grounding
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 explosion proof or intrinsic safety type trans-
mitter.
+
–
Transmitter
(with arrester)
Panel mounting
type arrester
PXC
Distributor
E
1
5
2
6
E
+
–
PTL
BUILT-IN ARRESTER
A1
Grounding resistor should be 100
Ω
.
Avoid common grounding with a lightning rod.
In case of a transmitter with arrester, maximum power supply is 32 VDC.
FCX-A2 series transmitter
External grounding terminal
CK+
CK –
+
–
Grounding terminal
INDICATION
