Sam4s ER-280 SERIES - H;W Flow Control Timing

2. Product Specifications
SAM4S ER-280 SERIES 2-5
2-5 Interface Specification
2-5-1-3 Signal Description (RJ-11 Connector)
Pin No. Signal Name Signal Direction Function
1 VCC Output VCC(+5V/150mA) is supplied at 9Pin of D-SUB Connector.
2 DSR Input
This signal indicates whether the host computer or receipt printer can receive data.
(H/W flow control)
④ MARK(Logic1) : The host can receive a data.
⑤ SPACE(Logic0) : The host can not receive a data
⑥ The ECR transmits a data to the host or receipt printer, after confirming this signal.
3 TXD Output Transmit Data
4 RXD Input Receive Data
7 Signal GND - Signal Ground
8 DTR Output
This Signal indicates whether the ECR(ER-260) is busy. (H/W flow control)
④ MARK(Logic1) : The ECR is busy
⑤ SPACE(Logic0) : The ECR is not busy
⑥ The host transmits a data to the ECR, after confirming this signal.
Table2-8 RS-232C Signal Description
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
DSUB Connector(Serial#1,Serial#2) and RJ-11 Connector(Serial#3)
Caution: If the device with 5V/150mA is connected to Serial#1, the VCC of Serial#2,Serial#3 can not use.
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.