ATAGO PRM-100a - Alarm Output Functionality

21
(3) Alarm Output (high- and low-limiter output)
The alarm output functions based on the established range of acceptable measurement values.
When a value is detected that falls outside of the acceptable range alarm output is transmitted from the
detection section.
The high-limiter and low-limiter output circuit has a photocoupler with a transistor open collector in the final
stage. See the diagram on the following page before using the limiter circuit.
①Dedicated cable (option) specifications (Fig. 8-6 and Fig. 8-7)
Table 8-3 Lead wire color
Pin number
Cord color
Signal name
1
Brown
High-limiter output
＋
2
Red
Low-limiter output
＋
3
Black
Limiter Com
－
4
Yellow
This pin is not applicable to this unit.
5
White
This pin is not applicable to this unit.
6
Green
This pin is not applicable to this unit.
Fig. 8-6
Fig. 8-7
②High- and low-limiter output typical applications
a. Drive a relay
b. Turn on a LED
c. Feed a sequencer or the like at the signal level (TTL)
※R (resistance) and V+ are not necessary if the input to a sequencer or the like is pulled up.
Table 8-4 Recommended photocoupler operating conditions (Type TLP523-2)
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Supply voltage
V cc
－
5
24
V
Forward current
I F
－
16
20
mA
Collector current
I c
－
－
40
mA
Operating
temperature
T opr
- 25
－
85
˚C
29.8m
m
φ12.6
Photocoupler
Relay coil
V
+
Photocouple
r
LDE
R
V+
50.0mm
Wire number plug front
view
4
1
2
5
6
3
Photocoupler
Sequencer
COM
V+
R