Auxiliary i/o connection – Research Concepts RC2500 User Manual
Page 116
RC2500 Antenna Controller
Appendix I
Replacing the SA 8840 109
Research Concepts, Inc. • 5420 Martindale Road • Shawnee, Kansas 66218-9680 • USA
www.researchconcepts.com
Auxiliary I/O Connection
J6, located directly above J7, is the Auxiliary I/O connector. This port, based on a DB-25 receptacle,
supports a single isolated input, contact closures for summary faults and peripheral equipment control as
well as two open collector relay drivers similar to those found in J7. The INTEST, INTEST Return and
Power Supply Common connections of J6 are duplicated here for convenience. A +24 VDC unregulated
output (1 Amp max) referenced to the RC2500 ground is also available. The individual pin definitions are
shown in the table below.
Pin #
Description
1
Summary Fault dry contact COM, (3A @ 125VAC or 3A @ 30VDC).
3
Summary Fault dry contact NO, (3A @ 125VAC or 3A @ 30VDC).
3
PC0 dry contact COM, (3A @ 125VAC or 3A @ 30VDC).
4
PC0 dry contact NC, (3A @ 125VAC or 3A @ 30VDC).
5
PC0 dry contact NO, (3A @ 125VAC or 3A @ 30VDC).
6
Unregulated +24 VDC bus voltage, 1 Amp max.
7
Unregulated +24 VDC bus voltage, 1 Amp max. externally jumpered to J6 pin 12.
8
AZ Speed, open collector relay driver, 700mA sink, (0.4V = AZ slow)
9
EL Speed, open collector relay driver, 700mA sink, (0.4V = EL slow)
10
INTEST (see J7 pin 10), 24VDC high current from A.I.U.
11
INTEST (see J7 pin 10), 24VDC high current from A.I.U.
12
INTEST Return (see J7 pin 23), externally jumpered to J6 pin 7.
13
INTEST Return (see J7 pin 23),
14
Summary Fault dry contact NC, (3A @ 125VAC or 3A @ 30VDC).
15
Unregulated +24 VDC return, (RC2500 ground)
16
Unregulated +24 VDC return, (RC2500 ground)
17
Unregulated +24 VDC return, (RC2500 ground)
18
Unregulated +24 VDC return, (RC2500 ground)
19
Unregulated +24 VDC return, (RC2500 ground)
20
Unregulated +24 VDC return, (RC2500 ground)
21
Unregulated +24 VDC return, (RC2500 ground), externally jumpered to J6 pin 24
22
Auxiliary Input 1, 24VDC low current.
23
Auxiliary Input 1 Return, 24VDC low current.
24
Power Supply Common, externally jumpered to J6 pin 21
25
Power Supply Common, (Referenced to the A.I.U. Loop Supply)
A 24” adapter cable has been produced ( RCI p/n FB-SA8840DONGL) that makes the interconnection
between the RC2500 and connectors that previously went to the SA8840 ACU. The Schematic of this
Dongle is supplied on the following page.