Supplement
Terminal Block
Connector
for DC Power Supply Connection
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. Different variations of the
connector are shown in Figure 1. All
are functionally identical.
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Supplied with such units is a kit
including 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 on the following
pages.
Caution
Figure 1. TB DC Input Connector Types
Appearing on Unit Panels
Prepare all connections to the TB plug before inserting it into the unit’s VDC-IN
connector.
Publication No. SUP-220-06/08
The Access Company
Terminal Block Connector
³ To prepare and connect the power
supply cable with the TB Plug:
Note: Refer to Figure 2 for assistance.
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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 3. (If a terminal is not already
open, loosen its screw.) Afterwards,
tighten the three terminal screws to
close them.
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3. Pull a nylon cable tie (supplied) around
the power supply cable to secure it
firmly to the TB plug grip, passing the
tie through the holes on the grip.
Figure 2. TB Plug Assembly
4. Isolate the exposed terminal
screws/wire leads using a plastic
sleeve or insulating tape to avoid a
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.
Figure 3. Mapping of the Power Supply Wire
Leads to the TB Plug Terminals
• Reversing the wire voltage polarity can cause damage to the unit!
Warning
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• Always connect a ground 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!
Terminal Block Connector
Note: Certain TB plugs are equipped with
captive screws for securing the assembled
cable’s TB plug to the unit’s VDC-IN
connector (C and E types only). To secure
the plug, tighten the two screws on the
plug into the corresponding holes on the
sides of the input connector as shown in
Figure 4.
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Figure 4. TB Plug with Captive Screws (optional)
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To disconnect the TB plug:
1. If the TB plug is equipped with captive screws, loosen the captive screws
(see Figure 4).
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2. If the unit’s VDC-IN connector is type B, lift the locking latch (see Figure 1).
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3. Pull out the TB plug carefully.
Caution Always lift the locking latch of type B connectors before disconnecting the
TB plug, to avoid damaging the TB plug.
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Terminal Block Connector
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