User`s manual

User’s Manual 63
A.1.1 Headers
The RCM2100 uses headers at J1, J2, and J3 for physical connection to other boards. J1
and J2 are 2 × 20 SMT headers with a 2 mm pin spacing. J3 is a 2 × 4 header with a 2 mm
pin spacing.
Figure A-3 shows the layout of another board for the RCM2100 to be plugged in to. These
reference design values are relative to the mounting hole or to the header connectors.
Figure A-3. User Board Footprint for the RCM2100
A.1.2 Physical Mounting
A 9/32” (7 mm) standoff with a 4-40 screw is recommended to attach the RCM2100 to a
user board at the hole position shown in Figure A-3. A standoff with a screw may also be
used at the hole position close to the RJ-45 Ethernet connector for a second anchor, or you
may opt to have a nut and bolt with a wire at this hole position if you removed resistor R5
and elected to ground the RJ-45 Ethernet connector to the chassis.
J1
1.134
(28.28)
2.375
(60.33)
J2
J3
J3 is not normally
installed
1.884
(47.85)
0.079
(2.0)
1.496
(38.00)
0.869
(22.07)
0.120 dia
(3.05)
0.020 sq typ
(0.5)
0.079
(2.0)