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3
SWITCHES
AND
SENSORS
Current
type
Load type
*2)
U min
[V]
Max. permanent current Imax [A] at U *1)
(UL & CSA)
M 12x1 DIN EN 175301-803, form A
30 V 30 V 48 V 125 V 250 V
Contact life
AC ohmic, inductive 6 0.1 0.1 0.1 0.1 0.1
≥ 2 x 10
5
switching cycles
DC ohmic, inductive 6 0.1 — — — —
Recommended circuit
Spark quenching and EMV intrinsically safe
1. Quick diode (D) with tv ≤ 200 ns, parallel to inductive load.
2. RC link in parallel to load in parallel to switching contact.
Dimensioning principles:
RL in Ω ≈ 0.2 x RLoad in Ω
C in [µF] ≈ ILoad in [A]
+
-
p
D
1) 2)
R
C
RL
U DC (AC)
d.c (a.c.)
~
~
2
3
1
p
2
4
1
p
Plug DIN EN 175301-803,
form A
Microswitch SPDT
Terminals 1 - 3: Contacts
close on rising pressure.
Terminals 1 - 2: Contacts
open on rising pressure.
Switching function
IEC 947-5-2, M12 x 1:
Microswitch SPDT
Terminals 1 - 4: Contacts
close on rising pressure.
Terminals 1 - 2: Contacts
open on rising pressure.
R
L
= Load resistance
Reference number: 20/min, Reference temperature: +20°C.
I min = 1 mA at 24 VDC or 5 mA at 6 VDC
*1) Higher currents (5 A max) will cause a reduction of the durability of the micro-switch contacts. Futhermore
additional measuements has to be taken to fulfil the EMV regulation 2004/108/EG by the manufacturer
*2) Spark quenching/overload protection will be necessary using inductive loads.
Switching capacity
Commutator with gold plated contacts
Switching function
18D
PNEUMATIC PRESSURE SWITCHES (DIAPHRAGM TYPE)
VAC - 435 PSI
