-
26
-
4. CONNECTIONS
4.5 Alarm Output Terminals (Optional)
Alarm output comes with only when alarm output (optional) is specified. The alarm output element is by a Form 1a1b contact
mechanical relay output.
(1) Alarm Output Terminals
Dot-printing type
3 pen type
(2) Alarm Output
(3) Connections
Make sure to turn off the power source and a buffer relay before connections for preventing an electric shock.
1. Connect the cables to a load via a buffer relay.
2. Connect the cables with the crimp style terminal covered by an insulation sleeve to the alarm output terminals.
Alarm type
Alarm mode
Alarm output behavior
Output terminal
OFF
ON
“
H” alarm
Upper limit alarm
N.O to COM terminals
Open
Short
N.C to COM terminals
Short
Open
“
L” alarm
Lower limit alarm
N.O to COM terminals
Open
Short
N.C to COM terminals
Short
Open
Connection example for Form 1a1b contact mechanical relay output
* N.C terminals have the reverse phase output to N.O terminals;
therefore, they are opened on alarm occurrence.
Power
supply
Load
b
a
Buffer relay
The instrument
N.O
COM
N.C
*
: Contact protective element (It is recommended to mount it
at the ‘a’ side.)
H L
H L
Common output
H
L
N.O
COM
N.C
1st pen
output
2nd pen
output
3rd pen
output
H L
N.O
COM
N.C