YSSC3P — SSCNET III Interface Adapter for LinuxCNC

YSSC3P is a PCI interface adapter compatible with Mitsubishi MR-J3/J4 SSCNET III network servo amplifiers. It supports up to 16 connected drives in position or velocity control mode. The card also features general-purpose I/O headers for connecting to limit switches and relays. The software includes LinuxCNC 2.7 driver module and an optional patch for absolute encoder support.

SSCNET is a synchronous high-speed network for servo drives and motion controllers. SSCNET only requires a simple daisy chain wiring between servo amplifiers. See Mitsubishi documentation for details.

Specifications

Compatible drives

Board layout

The card layout showing connectors and indication LEDs:

LEDs

Connectors

Jumpers


Jumpers

J1 — CN2 power
1-2CN2 pins 18, 20, 22, 24, 26 connect to GND
2-3--//-- to +5V*
* +5V is sourced from PCI connector via 500mA self-resettable fuse

J2 — JTAG
1TCK2GND
3TDI4TDO
5TMS6VCC 3.3V


Digital inputs

CN1 contains 12 optoisolated digital inputs. External 24VDC field power supply is required for operation. Example connection of open-collector outputs or mechanical switches is shown on schematics. Inputs can be either common anode or cathode. They are divided into 2 groups: 0-7 and 8-11

CN1
1IN02IN1
3IN24IN3
5IN46IN5
7IN68IN7
9IN810IN9
11IN1012IN11
13COM0-714COM8-11

Example connections:


Digital outputs

CN3 has 8 open-drain outputs from NCV7240 IC. Each output is rated to 600mA/36V max.

CN3
1OUT02OUT1
3OUT24OUT3
5OUT46OUT5
7OUT68OUT7
9GND10GND

Example connections:


Expansion

CN2 connector is intended for daughter boards.

All IO0..IO16 lines are 3.3V LVTTL and are 5V tolerant.

Pins 18, 20, 22, 24, 26 optionally provide 5V power to external devices. The power is taken from the PCI bus and fused to 500mA.

CN2
1IO02IO1
3IO24IO3
5IO46IO5
7IO68IO7
9IO810GND
11IO912GND
13IO1014GND
15IO1116GND
17IO1218GND or +5V
19IO1320GND or +5V
21IO1422GND or +5V
23IO1524GND or +5V
25IO1626GND or +5V*
* depends on J1 position, up to 500mA (fused)


Pin assignment for firmware v2.1 with YEX1-A:

CN2
1DAC SCK out2DAC CS_N out
3ENC0 A in4DAC SDI out
5ENC0 B in6ENC0 Z in
7485 RX in (YIO)8485 TE out (YIO)
9485 TX out (YIO)10GND
11422 RX in12GND
13422 TX out14GND
15-16GND
17-18GND or +5V
19ENC1 A in20GND or +5V
21ENC1 B in22GND or +5V
23ENC1 Z in24GND or +5V
25-26GND or +5V*
* depends on J1 position, up to 500mA (fused)