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Communications Unit Section 4-1
4-1 Communications Unit
The Communications Unit connects the MULTIPLE I/O TERMINAL to the
DeviceNet Network. Connections for a maximum of eight I/O Units can be
made with one Communications Unit.
Specifications
This product has been tested in the test laboratory of a third party authorized
by ODVA and has been approved as conforming to ODVA Conformance Soft-
ware Ver. 2.0-1.00.
Item Specification
Model DRT1-COM
DeviceNet com-
munications
power supply
Voltage range 11 to 25 VDC (supplied from the DeviceNet commu-
nications connector)
Unit current con-
sumption
30 mA max.
Internal power
supply
Voltage range
20.4 to 26.4 VDC (24 VDC
+10%
/
–15%
)
Unit current con-
sumption
110 mA max. (at 24 VDC)
Maximum cur-
rent
0.6 A (with maximum output to I/O Unit)
The capacity required for the internal power supply
of the Communications Unit can be obtained using
the following formula:
Communications Unit internal power supply current
= Communications Unit internal current consump-
tion + total current consumption for the I/O Unit inter-
faces
Inrush current 30 A max.
I/O Unit inter-
face
Number of Units
connected
8 Units max.
Total number of
inputs/outputs
Total inputs (IN) and outputs (OUT): 1,024 points
max.
Rated output
current
0.4 A max.
Overcurrent pro-
tection function
105% of rated current or higher. When an overcur-
rent occurs, the power supply to the I/O Units will
remain OFF until the power supply is turned ON
again.
Noise immunity ±2000 V
(IEC1000-4-4 via fast transient noise simulator)
Vibration resistance
10 to 150 Hz, 1.0-mm double amplitude or 70 m/s
2
Shock resistance
200 m/s
2
Dielectric strength 500 VAC (between isolated circuits)
Ambient temperature –10°C to 55°C
Ambient humidity 25% to 85% (with no condensation)
Operating atmosphere No corrosive gases
Storage temperature –25°C to 65°C
Mounting DIN 35-mm track
Weight Approx. 135 g
Safety standards UL508, CSA22.2
EMC directives EN50081-2, EN50082-2
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