Rapid-Air DUAL SWIVEL REEL: 100 & 1000 SERIES - Manual (Page 12)

Fig. 1 Basic RAMM Connection Diagram
CAUTION: Do not bundle potentiometer connections (P1, P2, P3) and inhibit
connections (I1, I2) with AC line or motor wires.
B. VOLTAGE FOLLOWING. All models can be controlled with an isolated analog ref-
erence voltage (0-6VDC) in lieu of the main speed potentiometer. The voltage is con-
nected to P2 (+) and F-. The control output voltage will linearly follow the input volt-
age. The source impedance of the input should be 10K ohms or less. The Min trimpot
can be used to provide an offset speed. If an offset is not required adjust the min to 0+
or 0– speed as desired. The max trimpot is rendered inoperative in the voltage follow-
ing mode. Use auxiliary trimpot to limit the control range. If the input signal is not iso-
lated, or is a current signal (4-20ma), the RAS1240D signal isolator must be used. It
will allow direct connection to process controllers and microprocessors.
CAUTION:
1. The voltage feeding P2 and F– must be isolated from the AC line. Do not ground
P2 or F– to set up a zero ground reference.
2. Do not bundle signal wires to P2 and F– with AC line motor connections. If signal
wires are over 18”, use shielded cables.
C. FUSING. The RAMM has provision for a built in AC line fuse and armature fuse.
The AC line fuse protects the control against catastrophic failure. If the fuse blows, the
control is miswired, the motor is shorted or grounded, or the RAMM control is defec-
tive. The armature fuse provides overload protection for the motor and control.
Choose the proper size armature fuse by multiplying the maximum DC motor amps by
1.7. On domestic 240 volt AC lines, separate branch circuit protection for each line
must be used. All fuses should be normal blow ceramic 3AG or ABC equivalent.