2.2 Interface Board Pin Connectors List

$\fbox{CN1: D Sub 37 Male}$

Pin 1-	U17-10 (Bit 0)
Pin 2-	U17-12 (Bit 1)
Pin 3-	U17-13 (Bit 2)
Pin 4-	U17-15 (Bit 3)
Pin 5-	U18-10 (Bit 4)
Pin 6-	U18-12 (Bit 5)
Pin 7-	U18-13 (Bit 6)
Pin 8-	U18-15 (Bit 7)
Pin 9-	U18-10 (Bit 8)
Pin 10-	U19-12 (Bit 9)
Pin 11-	U19-13 (Bit 10)
Pin 12-	U19-15 (Bit 11)
Pin 13-	U20-10 (Bit 12)
Pin 14-	U4-10 (Run)
Pin 15-	U5-9 (Fast/Slow)
Pin 16-	U4-12 (Home)
Pin 17-	100 mA FUS (+5V)
Pin 18-	U7-13 (Strobe)
Pin 19-	32 = Gnd
Pin 33-	37 NOT CONNECTED

$\fbox{CN2: D SUB 9 Male}$

Pin 1-	L1 Switch, R1, C1, U1-1 and CN4 (1)
Pin 2-	L2 Switch, R2, C2, U1-2 and CN4 (2)
Pin 3-	L3 Switch, R3, C3, U1-3 and CN4 (3)
Pin 4-	U21-5 (movement indicator)
Pin 5-	U21-13 (Pulse ok. but no movement)
Pin 6-	R4, R5, C33, CN5 (6) (Driver ok.),C33
Pin 7-	U11-4, U5-10-12, U10-2, R14 (Panic button on)
Pin 8-	Gnd
Pin 9-	Gnd

$\fbox{CN3: Power connector 2 pins, horizontal, male .156'' space.}$

Pin 1-	R15
Pin 2-	U11-2, C24

$\fbox{CN4: D Sub 9 Female}$

Pin 1-	L1 Switch, R1, C1, U1-1 and CN2 (1)
Pin 2-	L2 Switch, R2, C2, U1-2 and CN2 (2)
Pin 3-	L3 Switch, R3, C3, U1-3 and CN2 (3)
Pin 4-	Encoder CH A, Selection Pins for R21, U12-2-9 or R20, U8-2-4
Pin 5-	+ 5 volts
Pin 6-	Gnd
Pin 7-	Gnd
Pin 8-	Gnd
Pin 9-	Encoder CH B, Selection Pins for R20, U8-2-4 or R21, U12-2-9

$\fbox{CN5: D Sub 15 Female}$

Pin 1-	T1 collector, Direction switch
pin 2-	T2 collector, Slow switch
Pin 3-	T3 collector, Fast switch
Pin 4-	Shut down switch
Pin 5-	Shut down switch
Pin 6-	R4, R5, C33, CN2 (6) (Driver ok.)
Pin 7-	Gnd
Pin 8-	R23, U21-1 (Driver oscillator pulses)
Pin 9 to Pin 15-	Gnd