Samson 3374-11 - Page 18

18 EB 8331-4 EN
Design and principle of operation
Table3: Common data
Digital positioner
Input signal
Current input 0/4 to 20 mA, adjustable · R
i
= 50 Ω
Voltage input 0/2 to 10 V, adjustable · R
i
= 20 kΩ
Pt 1000 input
1)
Measuring range: –50 to 150 °C, 300 µA
Binary input
2)
By jumpering the terminals, not galvanically isolated
Position feedback Current 0/4 to 20 mA, adjustable · Error message 24 mA
Resolution 1000 steps or 0.02mA
Load Max. 200 Ω
Voltage 0/2 to 10 V, adjustable · Error message 12 V
Resolution 1000 steps or 0.01V
Load Minimum 5 kΩ
Binary input Open-circuit voltage: 10V; short-circuit current: 5mA
By jumpering the terminals, not galvanically isolated
Binary output
Floating, max. 230 V AC/1 A
Applications Positioner The travel follows the input signal
PID controller Fixed set point control
Two-step mode Two-step behavior, control over binary input
Three-step mode Three-step behavior, control over binary input
Temperature closed-
loop control upon
input signal failure
The integrated PID controller uses a xed set point for
closed-loop control when the input signal is missing.
Display Icons for functions, codes and text eld with backlight
Rotary pushbutton Operating control for on-site operation to select and con-
rm codes and values
Interface Standard RS-232 · For point-to-point connection to communication
participants or for memory pen · Permanently installed ·
Connection: RJ-12 connector socket
1)
For PID Controller (PID) and Temperature closed-loop control upon input signal failure (POSF)
applications only
2)
For two-step mode (2STP) and three-step mode (3STP) applications