External Interface Specifications (Diagnostic Port); Figure 5-2 Diagnostic Port Pinout - Webasto PosiCharge SVS100N Operation And Maintenance Manual

4. Remove the strain relief collar of the Communication Wires.
5. Remove the Communication Wires.
6. Remove the two 8M nuts from the DC Output Studs (Positive and Negative).
7. Open the strain relief collars of the Power Cables, by rotating the two internal bezels.
8. Re-install new cables in the reverse order, making sure that the polarity correct polarity is
respected, the strain relief is seated properly, and all the screws and nuts have been
tightened properly. Recommended torque: 20-25 Nm (177-221 in-lbs)
9. Close the front door prior to switching on the utility power and/or connecting a battery.
CAUTION
5.2

External Interface Specifications (Diagnostic Port)

Located on the charger side panel is a 4-pin RS232 connector that will allow devices such as
laptops to monitor the charger activity, data stream and charge history. As soon as the
application software is up and running communications can begin. The diagnostic port is
configured as a DCE device (Data Communications Equipment). Connect directly to a
standard PC RS-232 port (DTE) found on a PC. The port is a DSUB 9 pin female connector.
The serial port pin out is as follows:
Diagnostic
port pin
1
2
3
4
12876-W-03-01
Always be sure to completely re-install the strain relief when replacing
the DC Output Cables.
Signal
Description Characteristics
GND Serial data ground
reference
TXD Serial data
transmit from
charger
RXD Serial data receive
to charger

Figure 5-2 Diagnostic port pinout

SVS100N Operation/Maintenance Manual
Signal
Common
Diagnostic
36
Signal Signal
Source Destination
Common
Charger Diagnostic
Charger
tool
Webasto Charging Systems, Inc.
tool