36-70VDC
GND
A+ A- B- B+
36-70VDC
Figure C5.0: -48VDC Dual-Source, wiring connections to the External Terminal
Block on a RFL 3000 48VDC with Dual-Source option
Note: The GND should be hooked up first. The 4K unit has a floating ground, so the
user may elect to Ground or = terminal to suit the customer’s use.
Before connecting to 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 chassis. Ensure that each lead is securely tightened.
The 24VDC & 125VDC terminal block on RFL 3000 4K-Series Switch also has
C5.1
UL Requirements
The following must be adhered to in order to conform to UL requirements:
1.
For power and earthing wiring, use minimum 22 AWG size wiring.
2.
Fastening torque of the lugs on the terminal block: 9 inch pound max.
3.
Equipment for use in a Restricted Access Location only.
4.
Use only with listed 2A circuit breaker provided in the building installation.
5.
Centralized DC Power Source cable securement, use at least four cable ties to
secure the cable to the rack at least 4 inches apart with the first one located
within 6 inches of the terminal block.
C6.0 ORDERING
INFORMATION
To order the optional Dual-Source -48VDC power supply factory installed, order
“Dual-Src48V” as a separate line item following the product model.
Example:
RFL 3000 4K24-48VDC
Dual-Src-48V
for regular model with no ON-OFF switch
