Subrack

Subrack module holder for 19" rack installation of electrical boards and subunit modules

The 19" rack system is based on multiple levels described by the IEC 60297 standard. It can be summarised in the following 3 levels:

> 19" cabinet, frame or rack container
> module holder subrack
> subunits and Eurocard cards

eurocard card system, subunit, subrack, 19" rack cabinet

Printed circuit boards (PCBs)

Subracks and subunits are designed to hold cards in Eurocard formats, PCB sizes
height / height subrack (U)	height / height PCB (mm) h - 0.3 mm	depth / depth PCB (mm) t - 0.3 mm
height / height subrack (U)	height / height PCB (mm) h - 0.3 mm	160	220	280
3	100	x	x
6	233.35	x	x
9	366.70	x	x

" x " - most common size, (ask for other sizes).

The dimensions of Eurocard PCBs are established by the IEC 60297-3-101 standard. They start from a base height of 100 mm and a depth of 160 mm. The height can grow by multiples of a height unit (1 U = 44.45 mm), and the depth by multiples of 60 mm. PCBs are generally 1.6 mm or 2 mm thick. The mounting holes for the front panel and connector are as shown in the following drawing.

Front panel height / Height panel H
Height / Height subrack (U)	3U	6U	9U
H8 +/- 0.15	128.55	261.9	395.25
H9 +/- 0.2	122.5	255.85	389.2
H10 +/- 0.3	100	233.35	366.7

Depth pcb-front panel (subunit) D
Depth / Depth subunit
D3 - 0.3	160	220
D4 +/- 0.4	169.93	229.93

Eurocard PCB with faceplate and connector

backplane

Backplane with plug connector according to DIN 41612/IEC 60603-2 and IEC 61076-4-113

Backplane with plug connector as per IEC 61076-4-101

Backplane with plug connector according to IEC 61076-4-101

The IEC 60297-3-104 standard describes the dimensions of backplanes, the table below shows the most common heights

height (U)	3U	6U	9U
H6 +/- 0.2	122.50	255.85	389.20
H8 +/- 0.15	128.55	261.90	395.25

Different combinations of rear profiles and "Z" bars are possible for the direct use of DIN 41612, DIN 41617 and MIL-C-21097 connectors.
All our subracks comply with IEC 60297 and DIN 41494 standards and are characterized by solidity and precision construction, Surtec 650 anti-corrosion treatment of profiles and side walls, robustness, modularity, and compliance with various levels of EMC shielding. Different subrack families for different specific needs:

Silver Series : economical and versatile with support profiles with a single M5 threaded hole, alignment and squareness during assembly are achieved using special grooves in the walls of the subrack.

Gold Series : robust, precise, and complete with everything needed for effective EMC shielding, the support profiles are equipped with two M4 threaded holes that simultaneously ensure perfect alignment and squareness of the subrack as well as high resistance to vibration and mechanical stress. This family of products is dedicated and widely used in the railway, military, aerospace, and naval sectors. "Z" bars for DIN 41612, 41617 and MIL-C-21097 connectors