Connections; Power/Sdi/Tb Terminal Block - Sutron MONITOR Operation & Maintenance Manual

Connections

Power/SDI/TB Terminal Block

Power (Battery), SDI and tipping bucket sensors are wired to a terminal block inside
MONITOR. Connections are made to this terminal block with bare wires using a small
flat blade screwdriver (3.5mm or 0.125" wide). The connections on the terminal block
are as follows:
Connector name
1
Battery +
2
Battery GND
3 SDI Data
4
SDI +
5 SDI Ground
6
TB +
7 TB Ground
MONITOR requires external +12V power to operate. The most common power source is
a lead-acid battery. Connect the battery to pins labeled Battery + and Battery Ground the
external terminal strip.
SDI-12 Connections
The SDI-12 interface has only 3 connections – GND, +12V and Data. Wire these
connections directly to the SDI-12 connections on a compatible sensor. Please see the
SDI-12 measurement type
Tipping Bucket Connections
The tipping bucket connections are configured to measure the closure of a dry contact
switch. In most circumstances it doesn't matter which side of the switch is connected to
+ or Ground. For measurement setup, please see the
Description
Power +12V (supplies
power to MONITOR).
Power ground
SDI-12 data
12V output for SDI-12
sensors (always on,
toggles on Monitor reset)
SDI-12 ground
Tipping Bucket +
Tipping Bucket ground
for more information.
5
Power Connections
precipitation section.