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