VULCAN Technical Manual
Connectors, LEDs and jumpers
© 2007 Eurotech Ltd Issue D
50
A4-B4 Description
RS422 RX line termination resistor
(120
Ω
) connected.
Only fit if the VULCAN is at the end of
the network.
RS422 RX line termination resistor
(120
Ω
) disconnected.
A2 & B2
Description
RS422
full-duplex
RS485
half-duplex
JP2 – Jumper header
This user selectable jumper header is used to choose between the external battery and
on-board Supercap for RTC and SRAM power backup.
JP2 Description
Supercap connected (power backup for
RTC only).
External battery connected (power
backup for RTC and SRAM).
A4 B4
A4
B4
Default setting:
A1
A2
B1
B2
A2
A3
B2
B3
A1
A2
B1
B2
Default setting:
Default setting: