Sutron 8310 - Key Ports and Connections

Sutron Corporation 8310 & 7310 Users Manual 8800-1125Rev. 2.7 (BETA) 4/16/2014 pg. 28
C10
+12V
Protected 12 (protected with self-
resetting fuse, 900 mA max)
C11
SW’D
GND
C12
+12V
Switched 12 (battery / protected
with self-resetting fuse, 900 mA max)
C13
PROT
GND
C14
+5V
Protected 5V (system voltage with
self resetting fuse, 300mA max)
C15
SWD
GND
C16
+5V
Switched 5V (system voltage
protected with self-resetting fuse and
solid state switch, 500 mA max)
D – Digital Inputs, Outputs, COM4, Modem
Label
Description
D1
Digital
Inputs
GND
D2
IN1
D3
GND
D4
IN2
D5
GND
D6
IN3
D7
IN4
D8
Outputs
GND
D9
OUT5
D10
GND
D11
OUT6
D12
COM4
GND
D13
COM4
RS485A
Idles High (Standard RS-485
nomenclature this would be B)
D14
COM4
RS485B
Idles Low (Standard RS-485
nomenclature this would be A)
D15
Modem
TIP
D16
RING
Note: The 8310 provides a very weak bias to maintain the RS-485 idle condition. If the
connecting device is expecting stronger bus biasing, then external biasing resistors can be
added: one resistor between the D14 (RS485B) and GND terminals with a second resistor
between D13 (RS485A) and PROT +5V terminals. For mild biasing, use 100K resistors. For much
stronger biasing, use 10K resistors.
SD Card Socket
The SD card socket is located on the front panel of the 8310-N and the left side of the 8310-O.
An LED next to the SD card indicates lights when the SD card is being read or written to.