Magnum 6K8-Series Industrial Field Switch Installation and User Guide 03/06)
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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.
e)
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 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. The use of Ground
(GND) is optional; it connects to the Switch chassis. 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.
C5.1 UL Requirements
The following must be adhered to in order to conform to UL requirements:
1. Minimum 18 AWG cable for connection to a Centralized DC power source.
2. Minimum 14 AWG cable for connection to earthing wiring.
3. Use only with Listed 10 A circuit breaker provided in building installation.
4. “Complies with FDA radiation performance standards, 21 CFR subchapter J.”
or equivalent.
5. Fastening torque of the lugs on the terminal block: 9 inch pound max.
DC Terminal
Block (Dual-Source)
