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                16.1    MODULE SPECIFICATIONS  . . . . . . . . . . . . .  16-1
                16.1.1    Module Width . . . . . . . . . . . . . . . . .  16-1
                16.1.2    Number of Input Channels . . . . . . . . . . .  16-1
                16.1.3    Input Levels . . . . . . . . . . . . . . . . .  16-1
                16.1.4    Input  . . . . . . . . . . . . . . . . . . . .  16-1
                16.1.5    Latching . . . . . . . . . . . . . . . . . . .  16-2
                16.1.6    Response Time: . . . . . . . . . . . . . . . .  16-2
                16.1.7    CAMAC Codes, X and Q Responses . . . . . . . .  16-2
                16.1.8    CAMAC Speed  . . . . . . . . . . . . . . . . .  16-2
                16.1.9    Power Required . . . . . . . . . . . . . . . .  16-3
                16.1.10   Protection . . . . . . . . . . . . . . . . . .  16-3
                16.1.11   Operating Temperature Range  . . . . . . . . .  16-3
                16.2    FRONT PANEL  . . . . . . . . . . . . . . . . . .  16-3
                16.2.1    Front Panel Indicators . . . . . . . . . . . .  16-3
                16.2.2    Front Panel Connectors . . . . . . . . . . . .  16-3
                16.3    DRAWING PACKAGE NUMBER . . . . . . . . . . . . .  16-4
                16.4    RESPONSIBLE ENGINEER . . . . . . . . . . . . . .  16-4

                                      CHAPTER 16
                         ISOLATED DIGITAL INPUT MODULE (IDIM)
        This unit is designed as a general purpose digital input module.  Each
        input is opto-isolated and is designed to operate over a wide range of
        positive input voltages.  The unit is nonlatching, each CAMAC Read  of
        this unit presenting the data as seen at the inputs at the time of the
        Read command.

        16.1  MODULE SPECIFICATIONS


        16.1.1  Module Width

        Single.

        16.1.2  Number of Input Channels

        32, (numbered 0 through 31).

        16.1.3  Input Levels

              o  "0" = -30 through +1 volts,
              o  "1" = +3 through +30 volts.
              o  (Undefined from +1 volt to +3 volts.)

        16.1.4  Input

        Optically isolated with current drawn not to exceed 10 milliAmps at 30
        volts in.
        ______________________________
        This chapter is excerpted from TN-83-01.



        ISOLATED DIGITAL INPUT MODULE (IDIM)                         Page 16-2


        16.1.5  Latching

        All inputs nonlatching.  During a CAMAC read cycle the data is held.

        16.1.6  Response Time:

        100 microseconds maximum from input to Dataway.

        16.1.7  CAMAC Codes, X and Q Responses


        16.1.7.1  Read Functions -

              o  F0 A0 reads J1 inputs, R1 = Channel 0 X=1, Q=1 if J1-C9 >  12
                 volts.
              o  F0 A1 reads J2 inputs, R1 = Channel 16 X=1, Q=1 if J2-C9 > 12
                 volts.

        16.1.7.2  Write Functions -

        None.

        16.1.7.3  Command Functions -

        None.

        16.1.7.4  Other X and Q Responses -

        X=Q=0 for all other codes and conditions.

        16.1.7.5  C, Z, and I: - C, Z, and I have no effect on this module.


        16.1.8  CAMAC Speed

        This module will respond to  all  CAMAC  cycles  as  defined  in  IEEE
        Standard 583-1978.



        ISOLATED DIGITAL INPUT MODULE (IDIM)                         Page 16-3


        16.1.9  Power Required

              o  +6 volts, 500 milliAmps typical, 700 milliAmps maximum;
              o  +24 volts, 2-170 milliAmps, dependent upon J1&J2-C9 loading.

        16.1.10  Protection

              o  Inputs will withstand +/-  30  volts  indefinitely,  and  +/-
                 volts for one (1) second without damage.
              o  The +6 and +24 volt lines are  each  protected  with  a  fuse
                 consisting  of  a  single  strand  of #36 tinned copper wire.
                 Fusing current is about 3.5 Amps.

        16.1.11  Operating Temperature Range

        10 to 65 degrees Celsius.

        16.2  FRONT PANEL


        16.2.1  Front Panel Indicators

        "N" and "X", red LED's,  "Q"  and  "V",  green  LED's.   ("V"  lighted
        indicates both J1&J2-C9 > 12 volts.)

        16.2.2  Front Panel Connectors

        2 each, AMP P/N 204731-1.
        Pin assignments as follows:
        CHAN   SIGNAL    RETURN  || OTHER SIGNALS
         #                       || CONNECTION / FUNCTION
                                 ||
        00      J1-A1     J1-A2  ||
        01       1-A3      A-A4  || J1-C9    +24 Volts out
        02       1-A5      1-A6  ||          (see note)
        03       1-A7      1-A8  || J1-C10   Ground
        04       1-A9      1-A10 ||
        05       1-A11     1-A12 || J1-C11   N C
        06       1-B1      1-B2  ||
        07       1-B3      1-B4  || J1-C12   Ground
        08       1-B5      1-B6  ||



        ISOLATED DIGITAL INPUT MODULE (IDIM)                         Page 16-4

        09       1-B7      1-B8  ||
        10       1-B9      1-B10 ||
        11       1-B11     1-B12 ||
        12       1-C1      1-C2  || J2-C9    +24 Volts out
        13       1-C3      1-C4  ||          (see note)
        14       1-C5      1-C6  || J2-C10   Ground
        15      J1-C7     J1-C8  ||
        16      J2-A1     J2-A2  || J2-C11   N C
        17       1-A3      1-A4  ||
        18       1-A5      1-A6  || J2-C12   Ground
        19       1-A7      1-A8  ||
        20       1-A9      1-A10 ||
        21       1-A11     1-A12 ||
        22       1-B1      1-B2  || NOTE:  J1&J2-C9 are
        23       1-B3      1-B4  ||  connected to the
        24       1-B5      1-B6  ||  fused +24 volts
        25       1-B7      1-B8  ||  thru independent
        26       1-B9      1-B10 ||  100 Ohm, 10 Watt
        27       1-B11     1-B12 ||  resistor strings.
        28       1-C1      1-C2  ||
        29       1-C3      1-C4  ||
        30       1-C5      1-C6  ||
        31      J2-C7     J2-C8  ||

        16.3  DRAWING PACKAGE NUMBER

        135-562
        TN-83-01.

        16.4  RESPONSIBLE ENGINEER

        John Kieffer