Connecting the optional backup supply cable (24 v) – ElmoMC SimplIQ Digital Servo Drives-Cello Installation Guide User Manual
Page 24
Cello Installation Guide
Installation
MAN-CELIG (Ver. 1.602)
24
3.4.3 Connecting the Optional Backup Supply Cable (24 V)
Power to the Cello is provided by a 10 to 195 VDC source. A “smart” control-supply algorithm
enables the Cello to operate with the power supply only, with no need for an auxiliary 24 volt
supply. If backup functionality is required for storing control parameters in case of power-outs,
an external 24 VDC power supply can be connected, providing maximum flexibility and optional
backup functionality when needed.
To connect the backup supply to the 24v port on the bottom of the Cello, use the 2-pin power
plug provided with the Cello. Remember, you are working with DC power; be sure to exercise
caution. The required voltage is 24 VDC.
Notes for 24 VDC backup supply connections:
Use a 24 AWG twisted pair shielded cable. The shield should have copper braid.
The source of the 24 VDC must be isolated.
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 Positions
[+]
+24VDC
+24 VDC backup supply
[-]
RET24VDC
Return (common) of the 24 VDC
backup supply
Table 5: Backup Cable Plug
Figure 7: Backup Supply (24v) Connection Diagram