Research Concepts RC2500 - Manual (Page 153)

146 RC2500 Antenna Controller Appendix Q Working with the SA 8151
Research Concepts, Inc. • 5420 Martindale Road • Shawnee, Kansas • 66218-9680 • USA www.researchconcepts.com
Antenna I/O Connector
J7, located to the right of J4, is a DB-25 plug identified as the Antenna I/O connector. This connector
acts as the antenna motion control port of the RC2500. The port consists of 6 solid-state high-side
Darlington drivers rated at 20mA source each. 5V supply current is sourced from the LCU Local/Remote
switch via the Maintenance status input. ACU limit inputs are sourced with 5V from a non-switched LCU
5V supply. In addition to the drivers, this port supports three 24 VDC, low current, status inputs with
isolated returns. The individual pin definitions as well as their mating connection at the NPL 9000
Antenna Drive Unit are shown in the table below. All voltages are referenced to LCU return TB1-8.
RC2500 Pin #
& (resource #) Description SA 8151 LCU Pin #
1 (PA1) Azimuth Drive CW, pull-up drive, 20mA max
source. (5 V = move CW) AZ CW - TB2-2
2 Drive Common (return path for AZ, EL, & POL
drive command lines) LCU return TB1-8
3 (PA0) Azimuth Drive CCW, pull-up drive, 20mA max
source. (5 V = move CCW) AZ CCW - TB2-1
4 (PA4) Elevation Drive Up, pull-up drive, 20mA max
source. (5 V = move Up) EL UP TB1-2
5 Drive Common (return path for AZ, EL, & POL
drive command lines) No connect
6 (PA3) Elevation Drive Down, pull-up drive, 20mA max
source. (5 V = move Down) EL Down TB1-1
7 (PA7) Polarization Drive CW, pull-up drive, 20mA max
source. (5 V = move CW) No connect T.B.D.
8 Drive Common (return path for AZ, EL, & POL
drive command lines) No connect
9 (PA6) Polarization Drive CCW, pull-up drive, 20mA max
source. (5 V = move CW) No connect T.B.D.
10 (PB0) reserved input (same as J6 pin16) No connect
11 nc unused pin No connect
12 nc unused pin No connect
13 nc unused pin No connect
14 (P2.4) unused input No connect
15 (HSI.1) unused input No connect
16 (PB7) unused input No connect
17 (PB0,
HSI.1,P2.4) unused input return; (same as J6-4) No connect
18 (PB0
HSI.1,P2.4) unused input return; (same as J6-4) No connect
19 (PB7) unused input No connect
20 unused pin No connect
21 (PA2) unused output No connect
22 (PA5) unused output No connect
23 (PC2) unused output No connect
24 (PB6) Local/Remote Status input, 5 VDC low current, (5V
= LCU in remote mode…RC2500 active) Local / Remote TB1-6
25 (PB6) Local/Remote Status input return LCU return TB1-8