Tally Dascom 1125
USB Interface
The USB interface conforms to the Universal Serial Bus 2.0 Specifications. It supports the Full Speed mode at
12 Mbps. It uses the “B” type USB connector.
Serial Interface
Serial RS-232C Interface Pin Assignment
Pin Signal Symbol Signal Name Signal
1 CG Chassis Ground
2 TXD Send Data OUT
3 RXD Receive Data IN
4 RTS Request to Send OUT
7 SG Signal Ground
20 DTR Data Terminal Ready OUT
25 +5V Power
Serial RS-232 Connector Diagram
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