Statox 502 Control Module
Issue 1/2015
Page 13 of 40
Connecting the external reset and analog output
A GND-signal on terminal 1 initiates a reset just as pushing the RESET button.
The analog output generates a current analog to the actual measured value with 4 mA corresponding to
zero and 20 mA to end of scale. A measured value higher than end of scale generates 22 mA.
A system failure causes a current of 0 mA, the service mode causes a current of 2 or 4 mA (selectable).
Connecting the internal relays
Statox 502 has three relays, each equipped with one make and one break contact. Two relays monitor
alarm threshold exceeding, one system failure.
System failure relay: The SF-relay coil is always active and drops out in case of a system
failure or voltage drop.
The alarm relay parameters can be set in the main menu. The SF-relay settings cannot be changed.
Figure 9
shows the contacts:
1
2
3
4
0 – 22 mA
13 14 15
16
NC NO C
SF
17 18 19
20
NC NO C
A2
21 22 23
24
NC NO C
A1
!
Figure 8: Connections external reset and analog output
Figure 9: Relay contacts (coil de-energized)
