J041 SCPUB

Connections

PL1 STEbus connector

PL2 Power connector 5-pin Berg

+12V o 5    
-12V o 4   Mating connector Berg part number
VSBY o 3   65240-005 (shell)
gnd o 2   76357-401 (crimps)
+5V o 1    

PL3 I/O connector 20-way ribbon-cable

channel A data out 1 o o 2 channel A data in
channel A RTS out 3 o o 4 channelA CTSin
gnd 5 o o 6 n/c
channel B CTS in 7 o o 8 channel B RTS out
channel B data in 9 o o 10 channel B data out
gnd 11 o o 12 gnd
DTRB (TTL) 13 o o 14 DCDB (TTL)
DCDA (TTL) 15 o o 16 DTRA (TTL)
do not use 17 o o 18 RIB (TTL)
to link area 4 19 o o 20 to link area 4

PL4 Reset Switch Connector - 2 pins of a 2-pin jumper

o C o B o A o

(see Section 4) Connect a momentary action pushbutton switch across link A of PL4. Use twisted pair wiring and keep it as short as possible avoiding proximity to mains, switch-mode PSUs and other sources of electrical noise.