Communications Adapter Wiring - Thermo Scientific Scientific AquaSensors DataStick User Manual

3.3

Communications Adapter Wiring

Each communications adapter has a label printed at the end of the cable that indicates the supported protocol and the corresponding
wiring chart. The standard cable length is 10 feet with the idea that the cable will terminate in a junction box. It is however possible
to order the communications adapter with any length of cable up to the maximum allowed by the particular protocol being used.
In practice all adapters have four wires and a shield. Any Class 2 DC power supply that provides 24VDC can be used.
For DeviceNet, Modbus and RS-232 cables, the RED and BLACK wires are for power, the BLUE and WHITE wires are for
communications, and a bare shield wire is connected to EARTH GROUND for safety and electromagnetic immunity and emissions.
USB, Profibus and Ethernet Adapters are provided with standard connectors and discrete wiring for these adapters is not needed.
O-Ring seal should be
free of dirt when inserted
in the DataStick.
Retaining Ring:
Insert the Adapter into
the DataStick and rotated
until it engages.
Tighten the retaining ring
to lock down the adapter.
Use a 15/16 inch (24mm)
wrench. Rotate clockwise
to tighten.
Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide
RS-232 ASCII
Color DeviceNet
RED
BLACK Signal Ground
BLUE
WHITE
SHIELD
Partial List of Available Adapters
Adapter
Protocol
USB
RS-232
ASCII
Modbus RTU
over RS-232
or RS-485
Profibus DP
Potted Serial
number and
DeviceNet
Part number.
Ethernet
Modbus RTU
over RS-232
or RS-485
24 VDC 12 to 30 VDC
Signal Ground
CAN_L Comms (–)
CAN_H Comms (+)
Earth Earth
Standard Cable
Connection
USB Type 1A
Stripped wires
for terminal block
Stripped wires
for terminal block
Modbus/Profibus
Gateway
Stripped wires for
terminal block
RJ-45
RS-232
12 to 30 VDC
Signal Ground
Rx
Tx
Earth
Computer / Recommended
Software Power Source
PC / AquaComm 5 VDC
or ASCII (USB Standard)
PC / AquaComm
12 VDC (Type 2)
or ASCII
PC / AquaComm
24 VDC (Type 2)
PLC / Ladder Logic
PLC / Ladder Logic 24 VDC (Type 2)
PLC / Ladder Logic 24 VDC (Type 2)
24 VDC (Type 2)
PLC / Ladder Logic
POE Standard
20