UNRESTRICTED
INTERFERENCE FROM MOVEMENT (OS-MINI)
The low-noise sensing head cable on -HA models is resistant to interference caused by movement. The
sensing head may be mounted on moving machinery such as robot arms without affecting the accuracy of
the measured temperature.
ELECTRICAL INTERFERENCE
The OS-MINI and OS-MINI22 are tested to industrial standards for electromagnetic compatibility (EMC)
as shown in Specifications at the beginning of this manual.
To minimize electromagnetic interference or ‘noise’, the OS-MINI series sensor should be mounted away
from motors, generators and such like.
POWER SUPPLY (OS-MINI and OS-MINI22)
Be sure to use a 24 V DC (100 mA) power supply.
MECHANICAL INSTALLATION
Both OS-MINI and OS-MINI22 sensors come with a 1 m cable and a mounting nut as standard, and the
OS-MINIUSB comes with a 1.5m cable and mounting nuts. Longer cables are available to order. The
sensor can be mounted on brackets or cut-outs of your own design, or you can use the fixed or adjustable
mounting bracket accessories.
Note for OS-MINI and OS-MINI22:
The sensor housing must be connected to earth at one point, either
the housing of the sensing head, the electronics module, or the output cable shield termination. To avoid
ground loops, please ensure the sensor is grounded at only one of these points.
ELECTRICAL INSTALLATION
OS-MINI AND OS-MINI22 WIRING (ALL MODELS)
Check the distance between the sensing head and the electronics module, and between the electronics
module and the instrumentation. If necessary, the sensor can be ordered with a longer cable between the
sensing head and the electronics module.
The output cable from the electronics module should have an outer diameter between 3.0 and 6.5 mm,
with conductors of size 28 to 18 AWG.
The terminal blocks in the electronics module may be removed from the circuit board for easy wiring.
Do not disconnect the touch screen circuit board from the main circuit board while the sensor is on.
WIRING (-C4, -C4-R-D, -BB AND -BRT MODELS)
When connecting several sensors in a single Modbus network, all of the sensors should be connected via
a junction box to a single network bus cable, running from the furthest sensor to the Modbus Master.
Up to 247 sensors may be connected to a single Modbus network. Each sensor must have a unique
Modbus address. OS-MINI series sensors are normally shipped with Modbus address 1. The Modbus
address may be changed via the touch screen interface on -BRT models, or via Modbus.
To help prevent data reflections, please ensure the cable between each sensor and the main network bus
is as short as possible. The network bus should be terminated with a resistor of 120
Ω between the RS+
and RS- wires. The PWR- wire of the bus should be connected to the signal ground of the Modbus
Master.
Summary of Contents for OS-MINI SERIES
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