J105 STMC

B. Connections

All connectors are shown as seen looking into the board.

PL1 STEbus connector

PL2 Motor connector

6-way two part screw-terminal connector (both parts supplied).

NOTE: This is a two-part connector.
The part with screw terminals may be unplugged.

Pin FunctionConnection to RS motor 332-082
1 Motor ground Motor PSU ground
2 Phase 4 output Green/white lead
3 Phase 3 output Red/white lead
4 Phase 2 output Green lead
5 Phase 1 output Red lead
6 Motor positive
supply input
Motor positive
supply input

The motor white lead should be wired to one end of a resistor, and the black lead to one end of another resistor. The free ends of both resistors should then be connected to the motor positive supply. If the supply is 12V, the resistors should be 6.8 ohms, rated at at least 7 watts. The resistors should be located well away from any temperature-sensitive components and the motor positive supply should not be connected to the computer power supply.


Figure 3. Motor Connections


PL3. 50-way PCB mounted plug

Connector: Berg 50-way IDC.

Seen: Looking into PCB-mounted header.

  Function Pin Function
+5V 50 49 +5V
+12V 48 47 -12V
  n/c 46 45 n/c  
n/c 44 43 n/c
n/c 42 41 GND
HOLD output 40 39 S5 output Outputs
S4 output 38 37 S3 output
S2 output 36 35 S1 output
Output. Low=CCW 34 33 POUT output. One pulse/step.
n/c 32 31 GND
n/c 30 29 n/c Inputs
MON input. H starts 28 27 CNP input
L4 input (decel) 26 25 L3 input (deceleration)
L2 input(em. stop) 24 23 L1 input (emergency stop)
n/c 22 21 GND
7 20 19 6 Input port (IC12)
bits
5 18 17 4
3 16 15 2
1 14 13 0
n/c 12 11 GND
  7 10 9 6 Output port (IC13)
bits
5 8 7 4
3 6 5 2
1 4 3 0
GND 2 1 GND

See Appendix C for electrical characteristics.