Research Concepts RC2500 - Manual (Page 16)

RC2500 Antenna Controller Chapter 3 Installation/Setup 9
Research Concepts, Inc. • 5420 Martindale Road • Shawnee, Kansas • 66218-9680 • USA www.researchconcepts.com
1. Use the MODE key to place the controller into CONFIG mode ('CONFIG' displayed in the upper right
hand corner of the LCD).
2. Use the SCROLL DOWN and SCROLL UP keys to bring up the RESET SYSTEM DATA screen. If
the RESET SYSTEM DATA item does not appear, the EXPERT ACCESS flag (see section 2.5) may
need to be reset.
3. To inspect the status of the EXPERT ACCESS flag use the SCROLL DOWN key (while still in
CONFIG mode) to bring up the EXPERT ACCESS CONFIG mode item. If a 1 does not appear in the
data entry field, enter the 5 digit code described in section 2.5 to toggle the EXPERT ACCESS flag
on. This will allow access to the RESET SYSTEM DATA CONFIG mode item.
4. At the RESET SYSTEM DATA screen enter the same 5 digit code followed by the ENTER key.
3.3 Mechanical and Electrical Installation
This section covers the mechanical and electrical installation of the unit. For rack mount models, use 4
#10-32 mounting screws to secure the unit to a standard 19" rack. It is assumed that an Antenna
Interface Unit (A.I.U.) has been installed and is operational at the antenna. This “outdoor unit” is
connected to the RC2500 by at least one 25-conductor cable. For a minimum-level of operations of the
antenna through the RC2500, resolver connections for the active axes as well as the antenna interface
connections must be made.
All connections to the RC2500 are made at the back panel. The RC2500 back panel contains 4 holes for
potentiometer screw adjustment and 8 connectors of various types. The purpose of each of these
connectors is listed below. Please refer to figure 3.1 for a diagram of the controller back panel during the
following discussion.
Connector J1 is a DB-15 receptacle used primarily for AGC signal input while the RC2500 is tracking
inclined orbit satellites. In addition to this function, J1 supports 4 bits of digital I/O and various bus
voltages which allow for future expansion.
J2, J3, and J4 are identical DB-9 receptacles used to bring the low voltage resolver signals into the
RC2500. These act as the primary antenna-position sensing inputs. The duplicate pinout of these
connectors allow for easy testing of the position sensing circuitry by swapping connectors.
J5 is another DB-9 receptacle used for the remote control interface of the RC2500. The port conforms to
the RS-422 electrical specification. Mis-connections of J5 with J2, J3, or J4 will not cause system
damage.
J7, located to the right of J4, is a DB-25 plug that acts as the Antenna I/O connector. This connector acts
as the antenna motion control port of the RC2500. The port consists of multiple solid-state low-side relay
drivers rated at 700mA sink each. Max voltage is +27VDC on these drivers. In addition to the drivers this
port supports several 24 VDC, low current, status inputs with isolated return paths. For the 7134
summary limit version and the 9135 version, this connector acts as the only AIU connection. For the 7134
version with individual limits, all antenna motion commands use this connector along with a single limit
input, the remaining limit inputs are routed through J7.
J6, located directly above J7, is the Auxiliary I/O connector. This port, based on a DB-25 receptacle,
supports axis-specific limit inputs as well as contact closures for summary faults and peripheral
equipment control. A +5 VDC regulated output (200mA max), a +24 VDC unregulated output (1 Amp
max), and an analog voltage input are also available.
The final connector, J8, is an IEC power inlet combination. This module serves as a voltage switch
(115VAC/230VAC), single-ended fuse holder (2 Amp slow-blow at 115VAC; 1 AMP slow-blow at
230VAC), as well as supporting the standard inlet for Line, Neutral, and Ground from the AC mains