Rockwell Automation AK DBU - Dynamic Braking Unit 600/690 VAC - Manual (Page 20)

1-8 Installation/Wiring
Recommendations for the selection and wiring of the control cables:
• Cable must have copper conductors only.
• Cable with 600V rating or greater is required.
• Control cables outside the cabinet should be separated from power
cables by at least 0.3 meters (1 foot).
Figure 1.4 Input Control Terminals
Table 1.C Input Control Terminal Specifications
Drive(s) Run Interlock
In order to protect the DBU from an overtemperature condition, the
normally closed contact (DBU Overtemperature - terminals 10 and 11)
must be connected in series with a resistor thermostat to an AC-line
input contactor to ensure the drives are stopped if an overtemperature
condition occurs either in the DBU or the Brake Resistor.
See
Appendix A for contact ratings.
Control Wiring
No. Connection
Wire Size Range (1)
(1) Max./Min. sizes the terminals will accept - these are not recommendations.
Torque Maximum Minimum
0, 115 Fan Supply, 115V AC 4 mm 2
(11 AWG)
0.5 mm 2
(22 AWG)
0.8 Nm
(7 lb.-in.)
10, 11 Thermostat NC Output Contact,
Opens at power stack over temperature
Thermostat N.C. output contact
Fan Supply Input Terminals
11
10
115
0
!
ATTENTION: The DBU and the drive(s) do not offer protection for
externally mounted brake resistors. Risk of fire exists if the brake
resistors are not protected. Resistor packages must be self-protected
from overtemperature or a circuit equivalent to the one shown in
Figure
1.5 must be supplied.