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FRONT PANEL
DESCRIPTION
CAMAC OPERATION
10
Two LEMO type connectors are provided on the front panel of the Model
2132 (see Figure 2). DISABLE is an external inhibit of the low priority
LAM (L2). This eliminates computer overhead for routine HV mainte-
nance at critical times.
ERROR is an open collector 300 mA clamp to ground when a failure is
detected at an HV4032. It is intended for use with an external alarm.
Maximum V CC is 30 V.
The Serial I/O connector is an Amp Model 201298-1. It is compatible with
the HVDC-14 (AMP 201297-1).
A LED on the front panel illuminate each time the 2132 is addressed.
N: LED indicates that 2132 has been addressed.
DISABLE: A clamp-to-ground inhibits Q and low priority
LAM (L2) responses.
ERROR: An open collector 300 mA clamp-to-ground when
a failure is detected from an HV4032A. Intended for use
with an external alarm. Maximum Vcc is 30 V. System 1440
does not report errors through this line.
SERIAL I/O: Connector is compatible with HVDC-14 cable
for use with 4032A or AD/CAM cable used with System
1440.
Figure 2
The Model 2132 is a dual port device, communication with the HV
mainframes serial daisy chain via a Universal Asynchronous Receiver
Transmitter (UART) and with CAMAC via Dataway. Data words written
into the 2132 from CAMAC are loaded into a 40-word deep FIFO and are
available for CAMAC read out (Figure 3). Full buffering of both ports has
been provided to allow efficient operation in spite of the drastic difference
between the speed of the serial daisy chain and that of the computer.
Two levels of interrupt are employed by the 2132 system: High Priority
(L1) and Low Priority (L2) LAMs (HV4032 only). The Low Priority LAM is
used to indicate completion of data transmission from the HV4032 to the
2132 Interface. The L2 may be defeated by a TTY clamp-to-ground at
the front panel DISABLE Input. In this way, routine responses from the
HV4032s may be masked off when a LAM would be inconvenient. For
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