
New Version 2 PCB

Schematic for Ver 2 PCB
http://www.jlmaudio.com/8CHRELAYSW/8%20Channel%20Relay%20Switch%20Ver2.pdf
Select option you are going to use and fit all parts to pcb in order shown in build map link below.
Option 1 - 26 pin IDC header JLM 8 BUS or option 2 - DB25 Tascam pinout.
Use step by step build map at this link http://jlmaudio.com/builds/maps/8_channel_relay_switch_map.html
If using 24vdc relay for example (V- could be 0v and V+ 24vdc) or (V- could be -12v and V+ +12v)
JLM 8BUS ribbon lays out directly into IDC DB25 type connectors as Tascam format as long as red stripe pin 1 of ribbon cable lines up with pin25 DB25 which is the second pin from the end. So pin 13 is left empty and ribbon cable pin 25 & 26 are not used and removed.
JLM 8BUS 26pin input/output (Same as on Passive Monitor Controller, DSUB4, TASCAM/IDC to XLR/TRS IN & OUT PCB/kits etc)
Pin 1 0v (Pin 1 Square pad on PCB)
Pin 2 Ch1-
Pin 3 Ch1+
Pin 4 0v
Pin 5 Ch2-
Pin 6 Ch2+
Pin 7 0v
Pin 8 Ch3-
Pin 9 Ch3+
Pin 10 0v
Pin 11 Ch4-
Pin 12 Ch4+
Pin 13 0v
Pin 14 Ch5-
Pin 15 Ch5+
Pin 16 0v
Pin 17 Ch6-
Pin 18 Ch6+
Pin 19 0v
Pin 20 Ch7-
Pin 21 Ch7+
Pin 22 0v
Pin 23 Ch8-
Pin 24 Ch8+
Pin 25 V+
Pin 26 V-
JLM 16 pin IDC relay control & power port
Pin 1 - 4 V- (Pin 1 Square pad on PCB)
Pin 5 Ch1
Pin 6 Ch2
Pin 7 Ch3
Pin 8 Ch4
Pin 9 Ch5
Pin 10 Ch6
Pin 11 Ch7
Pin 12 Ch8
Pin 13 - 16 V+
Connect Ch wire to V+ to switch relay from NC normally closed to NO normally open 26 pin 8BUS connector.
Enjoy.