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4-1
4. CONNECTIONS
4.1 Terminal Board Diagram
The terminal board shown in the following figure is for the instrument with options ( alarm remote
contacts and communications interface ) are mounted.
The alert symbol mark ( ) is mounted at a place where one may receive an electric shock if one
should touch. (See the following table) Read paragraphs describing the connections of individual
terminals.
Name of terminals
Power terminals
Measuring input terminals
Alarm output terminals
Mounting place of
label
Lower left of power
terminals
Upper left of terminal cover
Upper left of terminal
cover
The input terminal block and alarm terminal block* are removable for easy connections.
*The terminals for the remote contacts are included.
1) Each terminal block can be removed by removing
two mounting screws.
2) Each terminal block is connected to the
instrument by a connector.
For mounting or dismounting the terminal
block, turn off the external power switch
for the purpose of preventing the electric
circuits from being damaged.
If the input terminal block is replaced with a new one, the calibration of thermocouple inputs
becomes incorrect.
Communications terminals
*(M3.5) (option)
Alarm output terminals
(M3.5)(option)
Remote contacts terminals
(M3.5) (option)
Measuring input
terminals (M3.5)
Power/protective conductor
terminals (M4)
* For the connections of
communications terminals, refer to
the separate [instruction manual for
communications interface].
(Caution)
Alarm output terminals
illustrated are MOS relay
output and mechanical relay
'a' contact outputs. Mechanical
relay 'c' contact outputs (The
lnternational safety standards
do not conform) differ the
terminal configuration.
TC,mV (+) , RTD (A) terminals
TC,mV (-) , RTD (B) terminals
RTD (B) terminals
Normally open (N.O) terminals
Common (COM) terminals
Alert symbol marks ( ) and places
Warning
Mounting screw
Input terminal
block
Input terminal block and alarm terminal block are removable
Turn off the power supply in advance.
Caution
Reference
Replacement of terminal block
Remarks
Содержание AL3000 SERIES
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Страница 116: ...32 8 KUMANO CHO ITABASHI KU TOKYO 173 8632 Telephone 81 3 3956 2171 Facsimile 81 3 3956 0915 Printed in Japan ...