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3.4.3 Connecting the Auxiliary Supply Cable (24v)
Connect the auxiliary supply to the 24VDC terminal block on the bottom of the Tuba.
Remember, you are working with DC power; so be sure to exercise caution.
Notes for 24 VDC auxiliary supply connections:
Use a 24 AWG twisted pair shielded cable. For best results the shield should have
aluminum foil covered by copper braid.
The 24 VDC auxiliary power supply must meet all safety standards and must be
separated from hazardous live voltages using reinforced or double insulation in
accordance with approved safety standards.
For safety reasons, connect the return of the 24 VDC source to the closest ground.
Connect the cable shield to the closest ground near the 24 VDC source.
Before applying power, first verify the polarity of the connection.
Pin Signal Function Pin Position
[+] +24VDC +24 VDC auxiliary
supply
[-] RET24VDC Return (common) of the
24 VDC auxiliary
supply
Table 3-3: Auxiliary Power Supply
TUB0017A
TUBA
Figure 3-11: Auxiliary Supply (24v) Connection Diagram
Tuba Installation Guide Installation
MAN-TUBIG (Ver. 1.3)
3-13