Samson 3731-3 Mounting And Operating Instructions page 13

Additional equipment
Optional binary output,
software limit switch, galvanically isolated
Connection: Optionally NAMUR EN 60947-5-6 or PLC, configurable as a limit switch or fault alarm output
Signal status
Operating voltage
Optional forced venting, galvanically isolated
Input
Signal
Optional analog position transmitter, two-wire transmitter
Supply voltage
Output signal
Direction of action
Operating range
Characteristic
Hysteresis and
HF influence
Other influences
Fault alarm
Optional binary input, galvanically isolated, optionally for detection of an externally applied voltage or for operation
of an external floating contact · Switching behavior configured as required, default setting (see below)
Voltage input function,
polarity insensitive, 0 to 24 V DC voltage to be applied, input resistance 6.5 kΩ
Static destruction limit
Voltage
Contact input function,
for external switch (floating contact)
Electrical data
Contact
Terminals B-C
Switching output AC/DC (PLC)
Conductive/remaining voltage < 1.7 V
Non-conducting/high resist. I < 100 µA
Switch. capacity: 40 V DC/28 V/AC 0.3 A
Static destr. limit: 45 V DC/32 V/AC 0.4 A
0 to 40 V DC/0 to 28 V AC, static destruction limit 45 V DC/32 V AC,
input resistance ≥ 7 kΩ
Fail-safe position at an input voltage ≤ 3 V
Normal operation at an input voltage > 5.5 V
11 to 35 V DC, reverse polarity protection, static destruction limit 45 V
4 to 20 mA
Reversible
–1.25 to 103 % of the travel range, corresponding to 3.8 to 20.5 mA, optionally also for
fault alarm over 2.4 or 21.6 mA acc. to NAMUR Recommendation NE 43
Linear
Same as positioner
Same as positioner
Can be issued with current signal 2.4 mA or 21.6 mA
40 V
> 6 V: Switching state ON · < 4 V: Switching state OFF
Open-circuit voltage when contact is open: 10 V, pulsed DC current, peak value 100 mA
Closed: Switching state ON · Open: Switching state OFF
Design and principle of operation
Terminals A-B
≥ 2.2 mA
≤ 1.0 mA
Only for connection to NAMUR signal
converter acc. to EN 60947-5-6
13
EB 8387-3 EN