Molecular Devices SkanWasher 300, User Manual

Page: 58 / 78

Appendix
A
:
Serial Communication Option (RS-232)
A-2 SkanWasher 300 User Guide
Step 2 Replace the EPROM circuit on the main PCB.
„
Identify the EPROM circuit on the main PCB (see Figure 17).
Replace with the new EPROM from kit. Avoid bending any of
the circuit legs. Note orientation of the circuit.
Step 3 Mount the front panel and the wash head on the washer.
Step 4 Switch main power on and verify the washer starts normally.
„
External cable provided with kit to connect to waste and RS-232
cable to connect to host computer.
Figure 17: SW300 Main PCB - Connectors
Parameters
Baud rate: 9,600 baud
Data bits 8
Parity None
Stop bits 1
The communication protocol is designed for single-character commands. No
data handshake control is implemented, nor are hardware, DTR/DSR, RTS/
CTS, software, or Xon/Xoff. Hardware handshake lines are interconnected in
the 9-pin female D-SUB connector.
EPROM
PID
RAM
TO/FROM
WASHHEAD
32V
5V
❋
❋
❋
PUMP
VALVE DRIVERS
MOTOR DRIVER
MOTOR TOUCH PAD POWER INLET
BATTERY
0V(GND)
TO/FROM
STACKER
EA-0561AC
µ
P
Testpoints for power supply
❋
RS232(NC)
LIFT SENSOR
WASTE FULL
MICROPLATE