RAD Data comm E1/T1 DC Power Supply Wire Voltage Polarity, TB Plug with Captive Screws optional

Note: Certain TB plugs are equipped with captive screws for securing the assembled cable’s

TB plug to the unit’s VDC-INconnector (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 3.

Captive screws

Figure 3. TB Plug with Captive Screws (optional)

DC Power Supply Wire Voltage Polarity

Refer to Figure 4 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

Chassis (frame) Ground

	TB Connector
	Plug
0	-48
	(-24or)

+ -

without a grounding conductor) can cause harm to the unit

or to the equipment connected to it!

Positive pole 24/48VDC Negative pole

Figure 4. Power Supply Wire Mapping

to TB Plug