Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide
20
Partial List of Available Adapters
Potted Serial
number and
Part number.
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.
Color
DeviceNet
Modbus RTU
over RS-232
or RS-485
RS-232
RED
24 VDC
12 to 30 VDC
12 to 30 VDC
BLACK
Signal Ground Signal Ground Signal Ground
BLUE
CAN_L
Comms (–)
Rx
WHITE
CAN_H
Comms (+)
Tx
SHIELD
Earth
Earth
Earth
Adapter
Protocol
Standard Cable
Connection
Computer /
Software
Recommended
Power Source
USB
USB Type 1A
PC / AquaComm
or ASCII
5 VDC
(USB Standard)
RS-232
ASCII
Stripped wires
for terminal block
PC / AquaComm
or ASCII
12 VDC (Type 2)
Modbus RTU
over RS-232
or RS-485
Stripped wires
for terminal block
PC / AquaComm
PLC / Ladder Logic
24 VDC (Type 2)
Profibus DP
Modbus/Profibus
Gateway
PLC / Ladder Logic
24 VDC (Type 2)
DeviceNet
Stripped wires for
terminal block
PLC / Ladder Logic
24 VDC (Type 2)
Ethernet
RJ-45
PLC / Ladder Logic
24 VDC (Type 2)
POE Standard
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.
O-Ring seal should be
free of dirt when inserted
in the DataStick.
RS-232 ASCII
