The device shall be supplied from an isolating source and protected by an overcur-
rent protection device such that the limited voltage circuit requirements in accor-
dance with UL 508 are met.
If the DC circuit is to be grounded (e.g. due to national regulations), the respective
directives must be adhered to (safe extra-low voltage, circuit electrically separated
from other circuits).
If the unit is AC supplied (DW2003), the low voltage provided for the sensor sup-
ply meets the SELV criteria according to EN 61010, overvoltage category II, soiling
degree 2.
To guarantee safe functioning, signal cables (sensors, transistor outputs, input sig-
nals) and load cables (power supply, relay outputs) should be laid separately.
If necessary, use a screened cable.
Connection of the sensors and transmitters
Terminal 10 can be used for the transmitter supply, triggering of the reset/release
input and supply of the transistor outputs.
Input reset 1/2 (external reset)
A pulse (+24 V DC) on terminal 18 resets the relay state latched in case of a fault
if the latching function is active (parameter SOx).
Pressing the pushbuttons continuously does not influence the monitoring function.
Input release 1/2 (external release of the start-up delay)
A signal (+24 V DC) on terminal 17 keeps outputs 1 and 2 in the same state as
with the active start-up delay. If the signal is no longer provided, the set start-up
delay (STx) starts. In case of a stored fault the signal on terminal 17 is only effec-
tive after a reset has been made.
MONITOR
AL-3
28
Versorgung über AL-3
fremdgespeist
2-Leiter
3 oder 4-Leiter
Versorgung über AL-3
fremdgespeist
10
5/6
11
In1/In2
1
2
4
3
10
5/6 In1/In2
1
2
4
5/6 In1/In2
1
2
4
5/6 In1/In2
1
2
4
3
The examples refer to ifm sensors!
Adhere to the information of the manufacturer.
2-wire
power supply via AL-3
3 or 4 wires
power supply via AL-3
external power supply
external power supply
