Samson 3730-2 Mounting And Operating Instructions page 12

Design and principle of operation
Solenoid valve
Input
Signal
Service life
Implementation in
safety-relevant systems in
compliance with
IEC 61508
Analog position
transmitter
Supply voltage
Output signal
Direction of action
Operating range
Characteristic
Hysteresis and HF influence
Ripple content of output
signal
Other influences
Fault indication
Inductive limit switch
For connection to switching amplifier acc. to EN 60947-5-6. Can be used in combination with a software limit switch.
External position sensor
Nominal travel
Cable
Ambient conditions
Degree of protection
Materials
Weight
12
EB 8384-2 EN
SIL 4 approval acc. to IEC 61508
24 V DC reverse polarity protection, static destruction limit 40 V;
Current consumption I =
Signal "0" no pick-up ≤ 15 V Signal "1" safe pick-up >19 V
>2 x 10 5 switching cycles
Probability of failure on demand of safety functions PFD < 2.8 x 10
level of 95 %.
The safe failure fraction (SFF) according to Table A1 in IEC 61508-2 is greater or
equal to 0.99. The valves are therefore suitable for implementation in safety-related
systems with a hardware fault tolerance of 1 or 2 up to and including SIL 4.
Two-wire transmitter
12 to 30 V DC, reverse polarity protection, static destruction limit 40 V
4 to 20 mA
Reversible
0 to 100 % of the travel range, optional also for fault indication over 2.4 or 21.6 mA
Linear
Same as positioner
0.6 % at 28 Hz acc. to IEC 381 T1
Same as positioner
Can be issued with current signal < 2.4 mA or > 21.6 mA
Type SJ 2SN Proximity Switch
Adjustable same as positioner
Max. 10 m with M12x1 connector, designed for continuous flexing, flame retardant
acc. to VDE 0472, reistant to oils, lubricants as well as other corrosive media
Perm. temperature: –40 to +105 °C, the limits specified in the EC Type Examination
Certificate additionally apply for explosion-protected devices.
Vibration immunity: up to 10 g in the range between 10 and 2000 Hz
IP 67
Housing: Die-cast aluminum GD AlSi12 acc. to DIN 1725 (3.2582), chromated and
plastic coated, special version. CrNiMo (1.4581); External parts: Stainless steel
1.4571 and 1.4301. Cable gland M20x1.5, black polyamide
Approx. 1.0 kg
−
U 5.6 V
(corresponding to 4.5 mA at 24 V)
Ω
4020
-7 for a confidence