2-
5
2
INST
ALLA
TION AND CONNECTION
2-2 Connecting the Power Supply
2-2-4 Installing a circuit protector
An inrush current, which might be from several to nearly 20 times higher than the rated current, flows
at the instant that the DRCX controller is turned on or the robot motors start to operate.
When installing an external circuit protector for the robot controller, select a circuit protector that
provides optimum operating characteristics.
To ensure proper operation, we recommend using a medium to slow response circuit protector with
an inertial delay function. (Refer to the circuit protector manufacturer’s data sheets for making the
selection.)
DRCX
20A
Example
Rated current
Operating characteristics
Slow type with inertia delay
300% 2 sec.
1000% 0.01 sec.
( )
2-2-5 Installing current control switches
When controlling the power on/off of the robot controller from an external device such as a PLC, a
current control switch (contactor, breaker, etc.) may be used. In this case, the current control switch
usually creates a large on/off inrush current. To minimize this on/off inrush current, surge killers
must be installed for surge absorption. Connect a surge killer in parallel with and close to each
contact of the current control switch.
Recommended surge killer:
Okaya Electric XE1201, XE1202, RE1202
Example:
: Surge killer
Controller
: Contactor
L
N
AC IN
2-2-6 Insulation resistance and voltage breakdown tests
Never attempt insulation resistance tests or voltage breakdown tests on the DRCX controller. Since
capacitive grounding is provided between the controller body and 0V, these tests may mistakenly
detect excess leakage current or damage the internal circuitry. If these tests are required, please
consult your YAMAHA sales office or representative.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
