TDK Lambda | Z+Low Voltage User Manual

RS232/485 NOTES: It is recommended when using ten or more power supplies in Daisy-chain system to connect 120Ω resistive termination at the last unit’s RS-485 out connector RS485 RS485 RS485

RS485 120 OHM

#1 120Ω, 0.5W between TXD+ and TXD-. 120Ω, 0.5W between RXD+ and RXD-. #2

#3

#31

L=0.5m typ.

8

1

8

1

8 PIN CONNECTOR (IN)

8 PIN CONNECTOR (OUT)

PIN NO. HOUSING

NAME SHIELD

PIN NO. HOUSING

NAME SHIELD

1 6 3 5 4

SG

1 6 3 5 4

SG

TXD- TXD+ RXD- RXD+

RXD- RXD+ TXD- TXD+

Fig.7-8: Serial link cable with RJ-45 shielded connectors (P/N: Z-RJ45)

7.7 GEN Protocol (GEN series communication language)

NOTE: The address (ADRn) commandmust returnan ”OK”responsebefore anyother commands are accepted.

7.7.1 Data Format Serial data format is 8 bit, one start bit and one stop bit. No parity bit. 7.7.2 End of Message The end of message is the Carriage Return character (ASCII 13, 0x0D). The power supply ignores the Line Feed (ASCII 10, 0x0A) character. 7.7.3 Command Repeat The backslash character ”\”will cause the last command to be repeated. 7.7.4 Checksum The usermay optionally add a checksumto the end of the command. The checksum is ”$”followed by two hex characters. If a command or a query has checksum, the response will also have one. There is no CR between the command string and the ”$” sign. Example: STT?$3A STAT?$7B 7.7.5 Acknowledge The power supply acknowledges received commands by returning ”OK” message. If an error is detected, the power supply will return an error message. The rules for checksum also apply to the acknowledge feature. 7.7.6 Backspace The backspace character (ASCII 8) clears the last character sent to the power supply. 7.7.7 Error Messages The power supply will return error messages for illegal commands and illegal programming parameters. Refer to Table 7-3 for programming error messages and Table 7-4 for command error messages.

85