User manual

Appendix A
Publication 17946.5.3 - May 1996
Specifications
1794ASB Remote I/O Adapter
I/O Capacity 8 modules
Input Voltage Rating 24V dc nominal
Input Voltage Range 19.2V to 31.2V dc (includes 5% ac ripple)
Communication Rate 57.6k bps
115.2k bps
230.4k bps
Indicators Adapter Active - green
Adapter fault - red
Local fault - red
Flexbus Output Current 640mA maximum
Isolation Voltage 100% tested at 850V dc for 1s between user power
and flexbus
Power Consumption 450mA maximum from external 24V supply
Power Dissipation 4.6W maximum @ 31.2V dc
Thermal Dissipation 15.7 BTU/hr @ 31.2V dc
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
Shock Operating
Nonoperating
Vibration
0 to 55
o
C (32 to 131
o
F)
-40 to 85
o
C (-40 to 185
o
F)
5 to 95% noncondensing
30 g peak acceleration, 11(+
1)ms pulse width
50 g peak acceleration, 11(+
1)ms pulse width
Tested 5 g @ 10-500Hz per IEC 6826
Remote I/O Cable Belden 9463 or equivalent as specified in
publication ICCG2.2
Power Conductors
Wire Size
Category
12 gauge (4mm
2
) stranded maximum
3/64 inch (1.2mm) insulation max.
2
1
Remote I/O Connector Plug Part Number 942029-03
Agency Certification
(when product or packaging is
marked)
• CSA certified
• CSA Class I, Division 2
Groups A, B, C, D certified
• UL listed
• CE marked for all applicable directives
1
Use this conductor category information for planning conductor routing. Refer to publication 17704.1, Industrial
Automation Wiring and Grounding Guidelines for Noise Immunity ."