Hytec Electronics Ltd.

Input/Output Registers Type IOR 400 & 440 CAMAC

Product Description

This single–width module contains a 24 bit input register and a 24 bit output register, with a further optional 8 bit settable outputs available on the 440 version only. A ’ Data Present’ input signal is used to set a read LAM to indicate that new input data is available to read. A ’ Data Accepted’ pulse or level is output after a time delay to indicate that the data has been read. The output register has 24 parallel open collector outputs which may be controlled from the dataway. A ’ Data Required’ signal may be used to set a Write LAM to indicate that new data is required. A ’Data Present’ pulse or level is generated after a delay to show that data is present.


  • Two versions available 400 basic and 440 with 8 extra bit settable outputs.
  • 24 Schmitt trigger inputs.
  • Optional R–C input integration.
  • Single link allows input logic inversion.
  • Inputs protected to +8v and –3v.
  • 24 Open collector outputs.
  • All outputs can sink 150mA at 0.35v.
  • All outputs can withstand +70v ’off’ state.
  • All outputs can withstand 350mA.
  • Controlled power down of outputs.
  • Output pulses true or inverted.
  • 25 (–3 version) or 37 way (–6 version) D Type front panel sockets. Extra 8 bits on 440 version uses rear panel 9 way D Type.

Power Requirements

+6 Volts at 1.45 Amps with no pull–ups.


0 deg C to 45 deg C.
Forced air cooling is advised for operation above 30 deg C.

Our policy is one of continuous product development and the right is reserved to supply equipment which may vary slightly from that described.

Hytec Electronics Ltd
Post : 5 Cradock Road, Reading, Berkshire, RG2 0JT, England.
Phone : +44 (0)118 9757770
Fax : +44 (0)118 9757566


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Last modified: September 24, 2008