KB Electronics KBWM-240 - Manual (Page 8)

D. Jumper J2 is provided on Model KBWM-240 only
and is factory set to “180V” position. For step-
down operation (208/230 Volts AC line input and 0-
90 Volts DC output), set J2 to the “90V” position.
See Figure 3.
III. MOUNTING
The KBWM™ is mounted via the rear cover
mounting strap. Before attempting to wire the
control, locate the mounting holes using the rear
cover as a template or use the dimensions as shown in the outline drawing. (See Figure 2,
page 4.) Be sure the control is mounted on a flat surface in a location where it will not be
exposed to contaminants such as water, metal chips, solvents or excessive vibration and/or
temperature extremes. Note: Allow adequate clearance around control to permit motor and
AC power cables to enter through the Bx knockouts on bottom of enclosure.
When mounting in an airtight enclosure, the air space should be large enough to provide ade-
quate heat dissipation. It is recommended that an enclosure with minimum dimensions of 12”H
x 12”W x 6”D (300mm x 300mm x 150mm) be used. The maximum allowable ambient temper-
ature at full rating is 50 ºC (122 ºF). Consult the Sales Department if more information is required.
Note: The KBWM™ can be oriented so that the AC power and motor wiring can be brought
in from the top of the control. Mount the rear cover so that the Bx knockouts are located on
the top by rotating the rear cover 180º. The front cover is then installed right side up using
the four (4) 6x32 screws previously removed from the top and bottom of the enclosure.
After wiring the front cover, install the mating rear cover with the four (4) 6x32 screws previ-
ously removed from the top and bottom of enclosures.
IV. WIRING
Be sure the AC power is “off” before wiring control. Read Safety Warning on page 1 before
attempting to use this control.
WARNING! To avoid erratic operation, do
not bundle AC line and motor wires with
potentiometer, voltage following, enable, inhibit or other
signal wiring. Use shielded cables on all signal wiring
over 12” (30 cm) – The shield should be earth ground-
ed on the control side only. Wire the control in accor-
dance with the National Electrical Code requirements
and other codes that may apply to your area.
A. AC Line – Wire the AC power to terminals L1 and
L2. Be sure that the control model corresponds to
the correct AC line input voltage. Model
KBWM–120 is for 115 VAC 50/60 Hz and model
KBWM–240 is for 208/230 VAC 50/60 Hz. See
Figure 4.
6
!
3.5
Maximum Tightening Torque
(in-lbs)
Supply Wire Gauge
Terminal Block
Designation
Connection
Designation
TB1 L1, L2, A+, A- 22 14
Minimum Maximum
TABLE 5 – TERMINAL BLOCK WIRING INFORMATION
SW6
L2 L1
BLU
A+ A-
TB1
M
MOTOR
-
+
AC LINE
FIGURE 4 – AC LINE & ARMATURE
CONNECTION
180V
90V
180V
90V
J2 Set for
180 Volt DC Motors
(Factory Setting)
J2 Set for
90 Volt DC Motors
(Step-Down)
FIGURE 3 – MOTOR VOLTAGE SELECTION
(MODEL KBWM-240 ONLY)