CERUS CI-007-P2 - VFD Options and Accessories; Dynamic Braking Unit (DBU) Sizing

Chapter 9 - Options
9-1
CHAPTER 9 - OPTIONS
9.1 Option List
External
Keypad LCD 32 character display
keypad Download and Upload available
All units
Remote Remote cable 6, 9 and 15-foot long keypad cable to
control VFD from remote keypad.
Optional
Dynamic
braking
DB unit and
resistor
Allows VFD to decelerate rapidly without
overvoltage fault.
Optional
Conduit box
option
NEMA TYPE 1
Conduit box
Install it for NEMA TYPE 1 rating. 20~125HP
15~90kW
Note: Refer to Option manual for details.
9.2 Remote Keypad Cable
Ordering No.
Description
CI-RKPK-EXT2M-P/S Remote cable –6ft
CI-RKPK-EXT3M-P/S Remote cable – 9ft
CI-RKPK-EXT5M-P/S Remote cable – 15ft
9.3 DBU (Dynamic Braking Unit) sizes
VFD
Applicable motor rating
DB Unit
Dimension
230V class
15 ~ 20 HP
(11 ~ 15 kW)
CI
-
DBU
-
20
-
2
Frame
1
25 ~ 30 HP
(18
.5 ~ 22 kW
)
CI
-
DBU
-
30
-
2
Frame 2
40 ~ 50 HP
(30 ~ 37 kW)
CI
-
DBU
-
40
-
2
60 ~ 75 HP
(45 ~ 55 kW)
CI
-
DBU
-
50
-
2
Frame
3
480V class
15 ~ 20 HP
(11 ~ 15 kW)
CI
-
DBU
-
20
-
4
Frame
1
25 ~ 30 HP
(18.5 ~ 22 kW
)
CI
-
DBU
-
30
-
4
Frame 2
40 ~ 50 HP (30 ~ 37 kW) CI-DBU-40-4
60 ~ 75 HP
(45 ~ 55 kW)
CI
-
DBU
-
50
-
4
Frame 3
100 HP
(75 kW)
CI
-
DBU
-
60
-
4
125 ~ 700 HP
(90~525 kW)
DBU Combination
DBU Combination
Note: P Series VFD does not have internal dynamic braking transistor and DB resistor and requires
external DBU and DBR set. Refer to DBU manual for multiple units and resistors arrangement.
9.4 DBU and DBR terminals and wiring
Terminals Description
G
Connect to system Ground terminal
B2
Connect to DB Resistor’s
B2
B1
Connect to DB Resistor’s
B1
N
Connect t
o VFD Negative terminal
N
-
P
Connect to VFD Positive terminal
P1+
Note: Refer to DBU and DBR manuals for proper wiring instructions.