RC2K90INT-1, RC2K90INT-2, RC2KINT RC2000 Antenna Interface Box V. 1.10 Contents Subject to Change 6/28/01 Research Concepts, Inc. 5420 Martindale Road Shawnee, Kansas 66218-9680 USA PH: (913) 422-0210; FAX: (913) 422-0211 WWW.ResearchConcepts.
RC2000 Antenna Controller Interface Box 1. Introduction This document describes a family of products that allow an RC2000 antenna controller to interface with antennas powered by either 90 or 180 volt DC motors (RC2K90INT-1 and RC2K90INT-2) or other motor types (RC2KINT). The RC2000 antenna controller is designed to interface directly with antennas which employ 36-Volt DC motors (8 amps maximum) and single phase pulse type position sensors.
RC2000 Antenna Controller Interface Box Dual-Speed Antenna Azimuth and Elevation Movement The RC2000 antenna controllers use a pulse width modulation scheme to obtain slow speed movement when interfaced to 36 volt DC motors. This pulse width modulation scheme is not compatible with the interface box.
RC2000 Antenna Controller Interface Box 4
RC2000 Antenna Controller Interface Box Note that the scheme shown in Figure 1 does not support slow speed movement. RC2000 antenna controllers normally vary motor speed by rapidly switching the 36 volt antenna drive signals off and on which gives an average voltage of less than 36 volts. If this pulse width modulated signal is applied to the circuit of Figure 1, the relays would chatter and produce erratic operation.
RC2000 Antenna Controller Interface Box Many large antennas use a sensor attached directly to each of the fundamental axis of the antenna. The sensor used may be a synchro, potentiometer, or a quadrature pulse encoder. A pulse type sensor attached to the fundamental axis of the antenna is not suitable for use with RC2000 antenna controllers. The reason for this requires a bit of explanation.
RC2000 Antenna Controller Interface Box 125 is designed for use with 120 volt AC line voltage. The KBPB-225 is designed for use with 240 VAC line voltage. These motor drive modules also provide speed control, electronic current limiting, IR compensation, and dynamic braking. A resistor which is installed in the KBPB called the Plug-In Horsepower Resistor matches the KBPB’s IR compensation and current limit characteristics to the DC motors used on the antenna.
RC2000 Antenna Controller Interface Box Figure 3 8
RC2000 Antenna Controller Interface Box The circuit associated with latching relay K4 is used by the RC2K90INT-1 interface box. With the RC2K90INT-1 interface box a single KBPB DC motor drive module is present and the latching relay is used to route the motor drive current to either the azimuth or elevation axis. The relay will not be included with the RC2K90INT-2 and RC2KINT model interface boxes.
RC2000 Antenna Controller Interface Box Figure 4 10
RC2000 Antenna Controller Interface Box Figure 5 11
RC2000 Antenna Controller Interface Box Figure 6 12
RC2000 Antenna Controller Interface Box 4.0 Heater Option A heater option has been developed for the RC2K90INT series of interface boxes. The KB Electronics KBPB Drive used in RCI 90VDC interface boxes has a low temperature rating of 0 C. This is inadequate for most environments. The heater option, designated RC2K90INT-HTR adds a maximum of 100W of heating to the box allowing a no-wind low temp of –50F for the std. 12 x 12x 6 inch interface box.
RC2000 Antenna Controller Interface Box requires a pair of conductors. Since the RC2000 motor drive outputs are not actually carrying motor drive current light gauge conductors (16-20 AWG) can be used, shielded cables are not required. In most cases the cable used to connect the RC2000 to the interface box will also include the conductors required to interface the RC2000 to the azimuth and elevation position sensors. Each sensor requires 3 conductors in a shielded cable with a drain wire.
RC2000 Antenna Controller Interface Box . 4.2.3 Antenna Motor and Limit Switch Connections The motor conductors should be sized appropriately for the motor load. Three conductor cable should be used so that the ground terminal of the motor can be connected to the ground lug in interface box. The limit switch conductors carry very little current, a pair of 20 to 18 gauge conductors are sufficient for the limit switch connections. 5.
RC2000 Antenna Controller Interface Box Please refer to the discussion of these CONFIG mode items in the RC2000 manual. Failure to properly configure these CONFIG mode items can result in inaccurate antenna positioning and/or excessive wear on the motors and actuators. Two of the CONFIG mode items have special features which are often useful in interface box applications. The last two digits of the Az/El Fast Deadband parameter can be configured so as to disable antenna runaway errors.
RC2000 Antenna Controller Interface Box (Buss type ABC, Littlefuse type 314, or equivalent). For more information on fusing please refer to the KBPB operators manual. 4.4.4 KBPB Modification If a KBPB-225 (designed for use at 220/240 VAC ) is used with 90 volt DC motors the KBPB-225 must be modified to insure that DC voltages greater than 90 volts are not applied to the motor. The model KBPB225 is used in all interface boxes designed for 220/240 VAC operation.
RC2000 Antenna Controller Interface Box Quan 1 5 9 2 Model/Description 240 Ohm, 1 Watt 150626 Connector 150646 Connector Z320LA15A 2 1 or 2 7105U15SYZ3QE KBPB-125 or KBPB-225 2 2 2 4 4 4 2 or 4 2 or 4 2 or 4 2 or 4 1 6-32 x 3/8” Screw #6 Lockwasher 6-32 Small Outline Nut ??” Standoff ?? Nut w/ Nylon Insert ?? Screw ?? Screw ?? Washer ?? Lock Washer ?? Nut 1414 PHL6LP 1 4 1418 N4D8 Insulated Ring Terminal Manufacturer Weidmuller Weidmuller CKE C&K KB Electronics, Inc. Hammond Mfg. Hammond Mfg.
Prodelin 3.8m Antenna Installation Kit Prodelin 3.8 Meter Antenna (Model 1381) Installation Kit 1 Introduction This document describes an installation kit that is used in conjunction with the RC2K90INT-1 interface box which allows an RC2000C AZ/EL antenna controller to control a Prodelin 3.8 meter antenna (Model 1381). The following issues are addressed in this paper ... • The AC power requirements of the interface box.
Prodelin 3.8m Antenna Installation Kit given below for the shielded sensor cables. In addition to the motor control signals a pair of individually shielded triples with drain wires are necessary for the sensor connections. Please note the following concerning the interconnect cable and sensor connections ... • Always use shielded cables for the sensors. • The shield drain wire should only be connected at the RC2000. • If the cable is spliced, be sure to splice the drain wire.
Prodelin 3.8m Antenna Installation Kit Description of Conduit Run Conduit Run Starting Point and Conduit Fitting Type Conduit Length Cable Type/Length Conduit Run Termination Point and Fitting Type Azimuth Limit Switch Azimuth Sensor, 90 Degree Fitting 31 Inches The Continuation of the 18/2 Cable Described in the Previous Entry. Azimuth Limit Switch, Straight Fitting.
Prodelin 3.8m Antenna Installation Kit does not come in contact with the sensor housing. Use the 3M Scotchlok connectors to make the connections. 5. At the azimuth and elevation motor terminal boxes, connect the 16/3 cables to the motor lead wires (refer to figure P1). Use the butt type crimp connectors to make the connections. The motor input leads are labeled A1 and A2. The green wire is the motor ground wire. 6.
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Prodelin 3.8m Antenna Installation Kit When all this has been completed connect the interface box to AC power. Please refer to section 2 for information concerning the AC hookup. 5.0 RC2000 Software Configuration The RC2000 stores certain parameters and configuration data in non-volatile memory. These parameters are viewed and modified via the controller’s CONFIG mode and are referred to as CONFIG mode items.
Prodelin 3.8m Antenna Installation Kit CONFIG Mode Item Required Value for Operation with Prodelin 3.8 meter antenna Attempts Comments Position Error counts of a target position. Az/El Fast Deadband 4000 milliseconds The controller will allow 4 seconds for the antenna to coast to a stop. If RUNAWAY errors occur the value of this parameter can be set to 4001 to disable the accumulation of counts when the antenna is not commanded to move or is not coasting to a stop.
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Prodelin 3.8m Antenna Installation Kit 7 Installation Checklist Before the installation, the following items should be addressed.... 1. Fused AC power with a local disconnect must be present at the antenna pad. The installation should conform to the NEC (National Electric Code) or any other applicable codes. Please refer to section 2 AC Power. The user is responsible for getting the AC power to the interface box - make provisions for any conduit or fittings which may be needed. 2.
Power PCB Relay 1
Power PCB Relay 2
Power PCB Relay 3
Power PCB Relay 4
KUL Series 5 & 10 Amp Magnetic Latching Relay 1
KUL Series 5 & 10 Amp Magnetic Latching Relay 2
KUL Series 5 & 10 Amp Magnetic Latching Relay 1
KUL Series 5 & 10 Amp Magnetic Latching Relay 2
KUL Series 5 & 10 Amp Magnetic Latching Relay 3
KUL Series 5 & 10 Amp Magnetic Latching Relay 4
Manual Revision History Manual Revision History 7/20/96 Revision 1.0 Included Appendix for Prodelin 3.8m 9/25/09 Added KPBP Operating Instructions.
