JCM Part No . 960 - 000076R _ Rev . 1 © 2007, JCM - American Corporation 2 - 4 Section 2 World Bill Acceptor (WBA® - 1x/2x - SS & SS2) Installation/Operation Table 2 - 5   WBA - 12/13,22&23 - SS2 20 Pin Rear Panel Connector Pin Assignments WBA - 12/13,22&23 - SS2 Rear Panel Connector Pin No . Signal Name * I/O † Function 1 +12V POWER +12V DC power 2 GROUND (Power) 0V DC Ground Plain 3 M . RES In Bill Acceptor master reset signal line 4 TXD Out Transmit serial data signal output line from WBA 5 +12V DC I/F +12V DC Interface Power 6 RXD In Receive serial data signal input line into WBA 7 GND I/F Zero (0) Volt DC Interface power 8 NC Reserved (No Connection) 9 NC Reserved (No Connection) 10 NC Reserved (No Connection) 11 NC Reserved (No Connection) 12 NC Reserved (No Connection) 13 GND Ground 14 LED+ LED Drive (anode) 15 NC Reserved (No Connection) 16 NC Reserved (No Connection) 17 NC Reserved (No Connection) 18 LED - LED Drive (cathode) 19 NC Reserved (No Connection) 20 NC Reserved (No Connection) * . I/O (input/output) is the terminal viewed from Bill Acceptor’s side . † . Signal name, I/O, and function without parenthesis are for ID - 003 interface . Socket Jack: DRA - 20PC - FO (JAE) Contact Type: DO2 - 22 - 26P - 10000 (JAE) Socket Plug: DRA - 20SC - FO (JAE) Contact Type: DO2 - 22 - 26S - 10000 (JAE)