Fluke Biomedical 956A-201-M2 - Manual (Page 71)

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Optional Circuit Boards
Option circuit boards are installed into the 50-pin J3 connector available on the main circuit board. As
many as three option boards may be stacked into the J3 bus. The following paragraphs describe the
available options. A separate manual for each option board is available with more detailed information.
Listed below are the option boards currently available. Refer to Table 1-1 for currently available
modifications and to Appendix C for the Bill of Materials.
1. 942-200-75: ANALOG INPUT OPTION BOARD - (Generally not used for normal operation with the
956A-201 UDR, however, it is used if the UDR is part of a simulator.) Contains four (4) separate
channels for analog inputs. A 0 to 10 Vdc input or 4 to 20 mA input can be selected independently for
each channel using the jumpers and switches provided on the board. Possible inputs to the board
include: temperature, pressure, flow, or simulated radiation.
2. 942-200-80: COMMUNICATIONS LOOP OPTION BOARD - Designed to enable a EIA RS232C serial
communications between VICTOREEN's ratemeter and a user computer system or CRT terminal, with
baud rates ranging from 50 to 19200 baud. An asynchronous communication interface adapter is
utilized to format the data and control the interface.
The VICTOREEN communications interface option board also provides the necessary circuitry to allow
interconnecting to a VICTOREEN proprietary serial communication port. This interface allows multiple
UDRs to share a common six-wire cable to a main central processor unit.
3. 942-200-95: ANALOG OUTPUT BOARD - Designed to provide a user selectable single output voltage
of: 0 -10 Vdc, 0 -5 Vdc, 0 -1 Vdc, 0 -500 mVdc, 0 -100 mVdc, 0 -50 mVdc, or 0 - 10 mVdc.
4. 942-200-95M1: DUAL ANALOG OUTPUT BOARD - Designed to provide two user selectable output
voltages. Output #1 is either 0 -5 Vdc, or 0 -10 Vdc, while output #2 is either 0 -1 0 mV dc, 0 -50
mVdc, 0 -100 mVdc, 0 -500 mVdc, or 0 -1 Vdc.