PIM00587
EN-47
8.5.3
Contact output
These are the contact output signals that output the alarm statuses of this unit. Connect them as necessary
by following the information below.
Refer to the “
11.5.3 Contact output and digital output selection
” for changing the output contents
.
Terminal
Name
Signal Name
Output Content: factory default setting
AL_A
Alarm output, NO contact
Conducts with “Common” when the pressure switch is not activated and
normal.
AL_B
Alarm output, NC contact
Conducts with “Common” when the pressure switch is activated or alarm occurs.
AL_C
Alarm output common
Can be either positive or negative
CAUTION
The switching capacity of the contact outputs is DC30 V/0.5 A (at resistance load). Note that driving a
load exceeding the permissible current may damage the contacts or other components.
The minimum applicable load for the contact outputs is DC10 mV/10
μ
A (at resistance load), but this is
only a guide to the lower limit where switching is possible with a minute load. The value varies
depending on the switching frequency, environmental conditions, etc., so it is advisable to check the
actual value.
When driving inductive loads, implement surge protection measures.
When an alarm signal is output, take action by referring to
12.3 Alarm Causes and Corrective Actions
ALMa
ALMb
COM
Alarm output, NO contact
Alarm output, NC contact
Alarm output common
Power ON: Normal status
