Input (CN1) – Input terminals, consisting of 23 channels. NPN/PNP, 5/24V selectable.
Axis (CN2) – Axis signal terminals, consisting of 6 axes, which are; X, Y, Z, A, B, C
Output (CN3) – Output terminals, consisting of 14 NPN sink outputs, Analog signal, 3 Relay’s
NO/NC and an inlet for the 24Vdc power supply
LPT1-3 – Connectors for the ESS
RJ-45 – Communication connector, part of the ESS board
ESS and MB3 piggyback
The ESS receives its 5Vdc power from the MB3 when all three jumpers of ESS are closed, which
is the default setting. But you may need to change the jumpers do so before you install. This
eliminates the need for an external 5Vdc supply.
The Raspberry Pi tall headers are used for firm connection between ESS and MB3 board. This
allows ESS to be mounted on MB3 directly without any ribbon cables. This method will
eliminates a number of contact points, distance, inductance and resistance between ESS and
MB3 board which allows signals go forth and back faster. Furthermore, this makes both
companions look nicer, lower in height.
Figure 3, ESS board installation
www.CNCRoom.com Page 8
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