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SCI 40-20 DIGITAL INTERFACE

Enabling an IEEE-488 controller to program 40 bits of TTL level signals as either inputs or outputs.

Providing 20 high current outputs for driving relays, turning on LED's and operating solenoids.


The SCI 40-20 is a compact multifunction I/O unit.

INPUT / OUTPUT

RELAY DRIVERS

I/O lines may be allocated as input or output in groups of 4. In output made lines may be changed in groups of 4 for easy transfer of hexadecimal data. In addition just one or more lines may be changed at a time
enabling the unit to be used in control applications.
In input made one or more 4 line ports may be read at a time and the data is returned as one or more hexadecimal characters.
The 20 high current outputs are intended for driving relays , contactors , lamps , etc. Each output may sink up to 250mA from an external power source of up to 30v. Outputs are open collector fitted with protection diodes. Straight forward ON/OFF commands allow outputs to be changed individually or in groups of any size.

SPECIFICATION

APPLICATIONS

Input / Output I/O lines are TTL compatible with 5mA sink capability. In input mode lines are high impendence.
  • Interfacing BCD Inputs or Outputs.
  • Driving LED's , Relays and Solenoids.
  • Generating TTL Pulses
  • Control of Custom Scanners
Relay Driver Relay drive outputs are R1 to R20 each being open collector with 250mA 30V capability.

ORDERING INFORMATION

PART No.

IEEE-488 Source Handshake (SH1).
Address Handshake (AH1).
Talk (T4).
Listen (L2).
Serial Poll (SR1).
40 line digital interface with
20 outputs for relay drive
230v version.
110v version.


SCI40-20-230
SCI40-20-110
Address Coding Source Handshake (SH1).
Address Handshake (AH1).
Talk (T4).
Listen (L2).
Serial Poll (SR1).

FULL DATA
SHEET AVAILABLE

Connection Two 25 way 'D' type sockets each provide 20 I/O lines.
One 25 way 'D' type socket provides 20 Relay drive outputs.
Mechanical 1u rack mounted unit,270mm depth.
Supply 230v or 110v versions
 

 

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