Sam4s ER-260 SERIES Service Manual page 13

2-5 Interface Specification
2-5-1-3 Signal Description
Pin No. Signal Name
BODY Frame GND
2 RXD
3 TXD
4 DTR
5 Signal GND
6 DSR
9 VCC
Caution: The VCC is supplied for the barcode or device power source. If the Total Power Consumption
of the attached devices is exceeded the specification(150mA), the system stops the VCC of
D-SUB Connector
2-5-1-4 H/W Flow Control Timing
When DTR/DSR flow control is select, before transmitting a data, the ECR checks whether the host is BUSY
or not.
If the host is BUSY, ECR does not transmit a data to the host. If the host is not BUSY, ECR transmits a data to
the Host.
The host is the same.
SAM4S ER-260 SERIES
Signal Direction
- Frame Ground
Input Receive Data
Output Transmit Data
This Signal indicates whether the ECR(ER-260) is busy. (H/W flow control)
① MARK(Logic1) : The ECR is busy
Output
② SPACE(Logic0) : The ECR is not busy
③ The host transmits a data to the ECR, after confirming this signal.
- Signal Ground
This signal indicates whether the host computer or receipt printer can receive data.
(H/W flow control)
① MARK(Logic1) : The host can receive a data.
Input
② SPACE(Logic0) : The host can not receive a data
③ The ECR transmits a data to the host or receipt printer, after confirming this signal.
Output VCC(+5V/150mA) is supplied at 9Pin of D-SUB Connector.
Table2-7 RS-232C Signal Description
2. Product Specifications
Function
2-7