RAD Data comm IPmux-1E User Manual

DC Power Supply Connection – Terminal Block Connector

Note: Ignore this supplement if the unit is AC-powered.

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 the connections to the TB plug before inserting it into the VDC-IN connector.

Preparing and Connecting the TB Plug

Refer to Figure 1 for assistance.

1. Strip the insulation of your power supply

cable 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 the terminal is not already open,
loosen its terminal screw.)

3. Tighten the three terminal screws.

4. 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).

5. Isolate the exposed terminal screws / wire

leads using a plastic sleeve or insulating tape, to prevent the possibility of short-circuit.

6. 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
serious damage to the unit!

DC Pow er Input

Connector

(o n u n it p a ne l)

M ating

TB C onnector

Plug

S e e Fig ure 2

fo r m ap p ing

Term in a l screw s

W ire strip ping

d im en sion s

Fig ure 1

D C p ow er

cab le

N y lo n ca ble tie

TB plug g rip

5 m m

2 0 m m

F or -24 or -48 V D C input:

F or +24 or +48 V D C input:

-4 8 (or -24 )

C ha s s is

(fra m e )

G ro u nd

C ha s s is

(fra m e )

G ro u nd

V D C in p ut

(n eg a tive po le)

V D C in p ut

(p ositive p ole )

G ro u nd

(0 )

G ro u nd

(0 )

Figure 2

SUP-220-04/00

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