2
Connections and User interface
1
.
Modbus over USB
: used to connect a device running
POWERMASTER
or custom
user application. Firmware update is also possible.
2
.
DC Output:
connected to the load. The output voltage is adjustable between 5 to
55Vdc.
3
.
DC-OK dry contact:
normally open relay contact is available; the relay closes
when the output voltage is >90% of the programmed output voltage value.
4
.
DC Input:
input voltage supply, range is from 12 to 48Vdc.
5
.
Display:
2-digits LED display used to program the device and read its status.
6 Control keys:
3 push buttons are provided to navigate through menus and to
select various functions.
Input Connection:
▪
+ = Positive DC
▪
- = Negative DC
▪
I
= Earth ground
Output Connection:
▪
+ = Positive DC
▪
- = Negative DC
Auxiliary Connection:
DC OK
: Dry contact
▪
NO
▪
COM
Mini USB-B Type
▪
1 = VBUS (+5V)
▪
2 = Data (D-)
▪
3 = Data (D+)
▪
4 = Not connected (ID)
▪
5 = GND
Recommended connecting cable
(Fig.5)
Recommended Tightening torque
0.5-0.6Nm
4.42-5.30 lbf in
Input / output connections
Solid: 2.5mm² / 12AWG
Stranded:2.5mm² / 12AWG
L: 6.0-7.5mm / 0.24-0.30in
Input connection
DC Line
Dimensions
Distances
(Fig.3)
Dimension
W
D
H
mm
40.0
110.0
115.0
Distance
A
B
mm
20
50
INSTRUCTIONS
1) Description:
NDW240 can be supplied with any voltage between 11Vdc and 55Vdc,
please respect the polarity
. The output voltage can be programmed to any
voltage between 5Vdc and 55Vdc.
To prevent damage in case of reverse polarity, the device is protected by an internal not replaceable fuse.
NDW240 can be used in SELV and PELV circuits.
2) Installation:
use DIN-rails according to EN 60715. Installation should be made vertically (see Fig.4). For better device stability fix the rail to the wall close to the point
where the device is to be mounted. In order to guarantee sufficient convection, we recommend observing a minimum distance to other modules (see Fig.3).
The device is provided with a thermal protection, a limited air flow can cause the thermal protection tripping.
The device automatically restarts after cooling.
To get normal operation reduce the temperature of the air surrounding the unit, increase the ventilation or reduce the load.