Rapid-Air STRAIGHTENER: SBX, SCX & SD SERIES - Manual (Page 22)

INTRODUCTION
The RAMM Full Wave Solid State DC Motor Speed Control represents the latest state of the
art design achievable through modern technology.
Features include:
Integrated Circuitry
Used to control and amplify command and reference levels with both closed and open loop
feedback to provide superior motor regulation. (Speed changes due to load, line voltage, or
temperature variations are held to minimum levels.)
High Quality Components
Selected and tested for proven dependability.
Transient Protection
Used to prevent failure of the power bridge circuit caused by voltage spikes on the AC line.
High Reliability
When used in accordance with the instructions in this manual, the RAMM will provide years of
trouble free operation.
A. Initial Setup and Wiring
i. General Instructions
1. Install proper size Plug In Horsepower Resistor.
(see table 2)
2. The RAMM can be connected to a standard 120V or 240V 50/60 Hz AC line (be
sure the AC input voltage corresponds to the control voltage rating and the motor rating (e.g.
90-130 VDC motor on 120 VAC and 180 VDC motor on 240 VAC).
3. Follow the recommended supply wire sizes as per table 3.
4. Follow the NEC and other electrical codes that apply.
CAUTION: SEPARATE BRANCH PROTECTION MUST BE PROVIDED ON 240V
CIRCUITS.
5. Connect control in accordance to connection diagram.
TABLE 3. MINIMUM SUPPLY WIRE SIZE REQUIREMENTS
*Maximum recommended wire size
MAX.
MOTOR
AMPS
(DC AMPS)
MAX.
MOTOR
HP
90V
MAX.
MOTOR
HP
180V MINIMUM WIRE SIZE
(AWG) Cu only
MAX. MAX.
MOTOR MOTOR
RUN RUN
6.0
12.0
16.0
1
1/2
1 1/2
1
2
3 16 14
14 12*
12 12