Physics and Engineering of Radiation Detection

(Martin Jones) #1

13.2. Modular Instruments 723


The modules are connected to the backplane through special NIM-connectors.
Each slot in a NIM crate is equipped with one such socket. The connector config-
uration of a standard NIM bin is shown in Fig.13.2.1. The connector assignments
can be found in Table 13.2.1.


Table 13.2.1: Connector assignments of a standard NIM bin (see Fig.13.2.1).

Pin Function Pin Function Pin Function

1 Reserved 15 Reserved 29 -24V

2 Reserved 16 +12V 30 Spare

3 Bin Gate 17 -12V 31 Spare

4 Reserved 18 Spare 32 Spare

5 19 Reserved 33 117 VDC

6 20 Spare 34 Ground (Power Return)

7 21 Spare 35 Reset

8 +200VDC 22 Reserved 36 Gate

9 Spare 23 Reserved 37 Spare

10 +6V 24 Reserved 38

11 -6V 25 Reserved 39

12 Reserved 26 Spare 40

13 Spare 27 Spare 41 117 VAC(Neutral)

14 Spare 28 +24V 42 Ground (High Quality)

A.2 NIMModules..........................

A standard NIM module has a height of 8.75 inches. The width of the module
can be variable but it must be a multiple of 1.35 inches. The pin layout of a
standard NIM module is a mirror image of the crate connector assignments shown
in Fig.13.2.1. Both front and rear sides of a typical NIM module also contain a
number of connectors to facilitate different I/O operations. Some of the modern
NIM modules also contain communication ports (such as RS232) to allow control

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