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Reed Switch
Band Mounting Style
D-A72/D-A73/D-A80
Auto Switch Specifications
Dimensions
Grommet
Electrical entry: Perpendicular
Weight
Auto switch model
0.5
3
5
10
47
—
10
47
77
10
47
—
D-A72
D-A73 D-A80
(g)
Lead wire length
(m)
PLC: Abbreviation of Programmable Logic Controller
D-A7 (With indicator light)
Auto switch model
Applicable load
Load voltage
Load current range
Contact protection circuit
Internal voltage drop
Indicator light
24 VDC
5 to 40 mA
None
2.4 V or less
Red LED lights when ON.
100 VAC
5 to 20 mA
D-A72
Relay, PLC
200 VAC
5 to 10 mA
D-A73
Relay, PLC
D-A80
Relay, IC circuit, PLC
40 mA
None
1 Ω or less (Including lead wire length of 3 m)
D-A8 (Without indicator light)
Auto switch model
Applicable load
Load voltage
Maximum load current
Contact protection circuit
Internal resistance
50 mA 20 mA
24 V or less
AC
DC
48 V
AC
DC
100 V
AC
DC
Auto Switch Internal Circuit
D-A72
D-A80
D-A73
Note 1) Operating load is an induction load.
Note 2) Wiring to the load is 5 m or longer.
Note 3) Load voltage is 100 VAC.
Use the contact protection box in any of the
above listed situations. The contact point life
may decrease. (Refer to page 12-13-5 for
contact protection box.)
LED
Reed switch
Resistor
Zener diode
Brown
Blue
Reed switch
Blue
LED
Reed switch
Resistor
Zener diode
Brown
Choke
coil
Contact protection box
CD-P11
Surge
absorber
ȁ
(3)
• Lead wire — Oil resistant vinyl heavy-duty cord,
ø3.4, 0.2 mm
2
, 2 cores (Brown, Blue), 0.5 m
Note 1) Regarding the common specifications of the reed switches, refer to page 12-13-5.
Note 2) Regarding the lead wire length, refer to page 12-13-5.
Note 3) Under 5 mA, the strength of the indicator light is poor. In some cases, visibility of the
indicator light will not be possible where the output signal is less than 2.5 mA. However,
there is no problem in terms of contact output, when an output signal exceeds 1 mA or
more.
Indicator light
15 (14)
23 (22)
Most sensitive position
( ) values for D-A72
9 (8.5)
6 (6.2) 3
D-A80 without
indicator light
OUT
Brown
OUT
Blue
OUT (
+)
Brown
OUT (–)
Blue
ȁ
ȁ
OUT (±)
Brown
OUT ( )
Blue
±
Contact
protection
box
CD-P11
CD-P12
Contact
protection
box
CD-P11
CD-P12
For details about certified products
conforming to international standards,
visit us at www.smcworld.com.
12-13-7
1st
MHZ
MHF
MHL
MHR
MHK
MHS
MHC
MHT
MHY
MHW
MRHQ
Misc.
D-
20-
12_13_D-.qxd 04.7.6 18:01 Page 13-7
7