Research Concepts RC2500 - Manual (Page 146)

RC2500 Antenna Controller Appendix O Replacing the Andrew APC100/ APC 300 139
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 9 solid-state low-side relay
drivers rated at 700mA sink each. Max voltage is +27VDC on these drivers. Current is returned to the
A.I.U. via the Drive Common line (pins 2,5, and 8). 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 LMKDS are shown in the table below.
RC2500 Pin #
& (resource #) Description LMKDS Pin #
1 (PA1) Azimuth Drive East, pull-down drive, 700mA max sink.
(0.4V = move east) AZ EAST TB1-2
2 Drive Common (return path for AZ, EL, & POL drive
command lines) No connect
3 (PA0) Azimuth Drive West, pull-down drive, 700mA max sink.
(0.4V = AZ move west) AZ WEST TB1-4
4 (PA4) Elevation Drive Up, pull-down drive, 700mA max sink.
(0.4V = EL move up) EL UP TB1-12
5 Drive Common (return path for AZ, EL, & POL drive
command lines) No connect
6 (PA3) Polarization CCW Command, pull-down drive, 700mA
max sink. (0.4V = Pol move CCW) POL CCW TB1-18
7 (PA7) Elevation Slow, pull-down drive, 700mA max sink. (0.4V
= EL move slow) EL SLOW TB1-16
8 Drive Common (return path for AZ, EL, & POL drive
command lines) No connect
9 (PA6) Elevation Fast, pull-down drive, 700mA max sink. (0.4V
= EL move fast) EL FAST TB1-14
10 (PB0) unused input No connect
11 +12V src +12V Reg. Source for AZ West and AZ East AZ West +; TB1-1 AZ
East +; TB1-3
12 +12V src +12V Reg. Source for EL Up and EL Down EL UP +; TB1-7 EL
DOWN +; TB1-9
13 +12V src +12V Reg. Source for POL CW and POL CCW POL CW +; TB1-13
POL CCW +; TB1-15
14 (P2.4) unused input No connect
15 (HSI.1) unused input No connect
16 (PB7) unused input return 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 nc No connect
21 (PA2) Azimuth Fast, pull-down drive, 700mA max sink. (0.4V =
AZ move fast) AZ FAST TB1-6
22 (PA5) Elevation Drive Down, pull-down drive, 700mA max sink.
(0.4V = EL move down) EL DOWN TB1-10
23 (PC2) Polarization CW Command, pull-down drive, 700mA max
sink. (0.4V = Pol move CW) POL CW TB1-20
24 (PB6) unused input dedicated pin, do not use
25 (PB6) unused input return No connect