GarrettCom 6K8 User Manual

Page 75

Magnum 6K8-Series Industrial Field Switch Installation and User Guide (04/07)

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absent, or even if it is connected with reverse polarity or shorted or grounded.

Reverse polarity connections, if they should accidentally occur on either input, will not damage

the Switch or power supply internally (nor will it blow the fuse in the internal power supply)

because of the blocking action of the diodes. This is true even if one input connection is

reversed while the Switch is operating from the other source.

The Switch will not receive power (and will not work) when both inputs are simultaneously

absent or are both incorrectly connected.

C5.0 INSTALLATION

This section describes the proper connection of the

-48VDC, 24VDC and 125VDC dual source leads to the -

48VDC, 24VDC & 125VDC power terminal block on the

Magnum 6Ks Switch as shown in Fig.

The -48VDC terminal block on the Magnum 6K8-Series Switch, as shown in Fig C5.0 is

located on the left front of the unit

and is equipped with five (5)

screw-down lead posts.

The primary terminals are identified as positive (A+), negative (A-), and the secondary

power terminals as negative (B-), positive (B+). The chassis “earth” or ground (GND) is

a threaded post with a #6 nut. The Dual Source terminal block for the 24VDC and

125VDC are similar. Figure C5.0: -48VDC-Dual-Src, wiring connections to the

External Terminal Block on a Magnum 6K8 -48VDC

Note: The GND should be hooked up first. The 6K8-Series unit has a floating ground,

so the user may elect to Ground either + or - terminal to suit the customer’s use.

Before connecting hot lines to the Terminal Block of –48VDC, 24VDC or 125VDC,

always use a digital voltmeter to measure the output voltage of the power supply and

determine the lead, which is more “+ve potential”. The more “+ve” voltage lead from

48V or –48V supply must be connected to the post labeled “+”.

The connection procedure is straightforward. Simply connect the DC leads to

the Switch’s power terminals, positive (+) and negative (-) screws. Ensure that each lead

is securely tightened.

The 24VDC & 125VDC terminal block on Magnum 6K8-Series’s is similar to

that described in the –48VDC information above.

DC Terminal