I/O connector panel

The RCP connector panel mounts on front or rear of standard 19 EIA rack and connects to I/O-62 via 1:1 62-pin 1.8 m (5 ft 11 in) cable (provided). It includes

  • Three internal relays and 4 12 V relay control signals for switching external devices.
  • Diagnostic power supply and self test LEDs for troubleshooting.

The connector panel uses programmable pin assignments made in softplane.conf and multiplexes the inputs and outputs of the I/O-62 PCI card.

I/O connector panel summary
J-ID Label Type Description
J1 AZ INPUT DBF25 20 TTL lines configurable to be either input or output lines. Maximum input level allowed is TTL.
J2 AZ OUTPUT DBF25 20 TTL lines configurable to be either input or output lines. Maximum input level allowed is TTL.
J3 CONTROL DBF25

16 assignable digital control/status lines:

  • Maximum input voltage is ±27 VDC
  • Configurable to RS-422 differential or TTL input/output
  • In TTL: Logical threshold of +2.5 VDC, output impedance of 120 Ω and configurable pull up (+5 VDC) or pull down (GND) resistor of 2.2 kΩ available.
  • In RS-422: 100 Ω termination across differential line pairs available. Low output impedance.

Two fixed RS422 differential lines.
J4 EL INPUT DBF25 20 TTL lines configurable to be either input or output lines. Maximum input level allowed is TTL.
J5 EL OUTPUT DBF25 20 TTL lines configurable to be either input or output lines. Maximum input level allowed is TTL.
J6 RELAY DBF25

Three internal relays, contact rating 0.5 A continuous.

The switching load is 0.25 A and 100 V, with the additional constraint that the total power not exceed 4 VA.

Four 12 V relay control signals, up to 200 mA. Note that external relays should be equipped with proper diode protection to shunt the back EMF.
J7 BITE 19:0 DBF25 20 TTL lines configurable to be either input or output lines. Maximum input level allowed is TTL.
J8 ANALOG IN DBF25 10 differential analog inputs, up to ±20 V max multiplexed into A/D convertor sampling each at >1000 Hz.
J9 PED/STATUS DBF25

AZ/EL tachometer differential inputs (±2 to ±70 VDC) and AZ/EL drive outputs (±10 VDC). 14 assignable digital control/status lines:

  • Maximum input voltage ±27 VDC - Configurable to RS-422 differential or TTL input/output
  • In TTL: Logical threshold of +2.5 VDC, output impedance of 120 Ω and configurable pull up (+5 VDC) or pull down (GND) resistor of 2.2 kΩ available.
  • In RS-422: 100 Ω termination across differential line pairs available. Low output impedance.
J10 SERIAL DBF9 RS232C
J11 SERIAL DBF9 RS232C
J12 S-D Modular 3 × 4 matrix connector for AZ and EL synchro and reference inputs (nominally 90 V and 60 Hz).
J13 TP1 BNC Programmable scope test point. 75 Ω
J14/15 SPARE BNC
J16 TP2 BNC Programmable scope test point. 75 Ω
J17/18 SPARE BNC