DC Power Supply Connection – Terminal Block Connector
Note: Ignore this supplement if the unit is AC-powered.
Certain DC-powered units are equipped with a plastic 3-pin
VDC-IN
power input connector, located on the unit
rear panel. Supplied with such a unit, is a mating Terminal Block (TB) type connector plug for attaching to your
power supply cable.
Connect the wires of your power supply cable to the TB plug, according to the voltage polarity and assembly
instructions provided below.
Caution:
Prepare all connections to the TB plug
before
inserting it into the unit’s VDC-IN connector.
Preparing and Connecting the TB Plug
Refer to Figure 1 for assistance.
1. Strip the insulation of your power supply
wires according to the dimensions shown.
2. Place each wire lead into the appropriate TB
plug terminal according to the voltage
polarity mapping shown in
Figure 2.
(If a
terminal is not already open, loosen its
screw). Afterwards, tighten close the three
terminal screws.
3. Pull a nylon cable tie (supplied) around the
power supply cable to secure it firmly to the
TB plug grip (pass the tie through the holes
on the grip).
4. Isolate the exposed terminal screws/wire leads using a plastic
sleeve or insulating tape, to prevent the possibility of short-circuit.
5. Connect the assembled power supply cable to the unit by
inserting the TB plug into the unit’s
VDC-IN
connector until it
snaps into place.
DC Power Supply Wire Voltage Polarity
Refer to
Figure 2
for proper mapping of the power supply wire leads
to the TB plug’s three terminals.
Warning:
•
Reversing the wire voltage polarity can cause damage to the unit!
•
Always connect a ground (earth) wire to the TB plug’s Chassis
(frame) Ground terminal. Connecting the unit without a protective
ground, or interruption of the grounding (for example, by using an
extension power cord without a grounding conductor) can cause
harm to the unit or to the equipment connected to it!
DC Power Input
Connector
(on unit panel)
Mating
TB Connector
Plug
See Figure 2
for mapping
Terminal screws
Wire stripping
dimensions
Figure 1
DC power
cable
Nylon cable tie
TB plug grip
5 mm
20 mm
0
-48
or
-24
Chassis (frame)
Ground
+
Positive pole
-
Negative pole
( )
24/48VDC
TB Connector
Plug
Figure 2
SUP-221-01/02