Better BT-1 - 5.1 Serial (RS232, TTL) Interface; 5.1.1 Power Supply Connector; 5.1.2 RS232 Connector

BT-1 user manual
Page 9 of 70
5.1 Serial (RS232, TTL)
5.1.1 Power supply connector
J5
User side matching connector
Molex 51021 Series
（
female
）
Molex, 53047 Series 9 contacts
（
male
）
Contacts: 50079/50058
Pin number Signal name Pin number
Signal name
V bat
1
2
3
4
GND
GND
GND
GND
6
7
8
9
V bat
V bat
V bat
5
GND
5.1.2 RS232 connector
J4
User side matching connector
Molex 51021 Series（female）
Contacts: 50079/50058
Molex, 53047 Series 5 contacts
（
male
）
Pin number
Signal name
GND
1
2
3
4
5
Transmit data(Txd, printer output)
Receive data(Rxd, printer input)
CTS/DSR(printer input)
RTS/DTR(printer output)
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