88
Wiring Precautions
Section 3-6
• The circuit below should
NOT
be used for I/O devices having a voltage
output.
Precautions when
Connecting a Two-wire DC
Sensor
When using a two-wire sensor with a 24-V DC input device, check that the fol-
lowing conditions have been met. Failure to meet these conditions may result
in operating errors.
1,2,3...
1.
Relation between the FQM1 ON voltage and the sensor residual voltage:
V
ON
≤
V
CC
– V
R
2.
Relation between the FQM1 ON current and sensor control output (load
current):
I
OUT
(min)
≤
I
ON
≤
I
OUT
(max.)
I
ON
= (V
CC
– V
R
– 1.5 [FQM1 internal residual voltage])/R
IN
If I
ON
is smaller than I
OUT
(min), connect a bleeder resistor R. The bleeder
resistor constant can be calculated as follows:
R
≤
(V
CC
– V
R
)/(I
OUT
(min.) – I
ON
)
Power W
≥
(V
CC
– V
R
)
2
/R
×
4 [allowable margin]
IN
7 mA
0 V
+
COM
+
IN
COM
7 mA
0 V
+
IN
COM
0 V
+
+
Output
Output
Output
NPN current output
PNP current output
Voltage output
Sensor
power
supply
Sensor power
supply
Sensor
power
supply
DC input
DC input
DC input
Current
regulator
+
IN
0 V
+
COM
−
Sensor
power
supply
DC input
Output
Summary of Contents for HOME SECURITY SYSTEM - MOTION SENSOR FQM1-CM001
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 23: ...xxiv Data Backup 5...
Page 53: ...30 Function Tables Arranged by Purpose Section 1 7...
Page 71: ...48 Memory Block Diagram Section 2 7...
Page 254: ...231 Analog Outputs Section 7 10...
Page 255: ...232 Analog Outputs Section 7 10...
Page 263: ...240 Connecting the CX Programmer Section 8 2...
Page 285: ...262 Inspections Section 10 1...
Page 397: ...374 Auxiliary Area Allocations Appendix D...
Page 409: ...386 Index...
Page 411: ...388...