![background image](http://html1.mh-extra.com/html/snell-and-wilcox/hd1012/hd1012_installation-manual_1309062040.webp)
www.snellwilcox.com
Page
HD1012 Installation Manual – V3, Issue 1, Rev 1
S&W Production & Post Production
32
OTHER INSTALLATION PROCEDURES –
continued
Diode Buffer
9 pin “D”- type
Female Connector
(To Extender)
Wiring of pins
between
Connectors
9 pin “D”- type
Male Connector
(To control Panel)
Description
Pin 1
Pin 1
GND
Pin 2
R
Pin 2
TX -
Pin 3
Pin 3
RX +
Pin 4
Pin 4
-
Pin 5
Pin 5
-
Pin 6
Pin 6
-
Pin 7
R
Pin 7
TX +
Pin 8
Pin 8
RX -
Pin 9
Pin 9
GND
Both diodes are 1N4148 and both resistors are 100 ohm.
The resistors are only fitted to the master diode buffer.