Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
163
Specifications
Appendix C
Safety Digital Output Module Specifications
Attribute
1734-OB8S Series A
Safety Output
Outputs per module
8
Output type
Current sourcing
Output current (each output point)
1 A max
Pulse width
475
μ
s
Pulse period
575 ms
Maximum field capacitance limit permitted per output
950 nF
On-state voltage drop
0.165V
Leakage current, max
0.1 mA
Short-circuit detection
Yes (short high and low and cross-circuit fault detect)
Short-circuit protection
Electronic
Aggregate current of outputs per module
8 A (4 A per terminal base) @ 40 °C (104 °F)
1734-OB8S temperature versus current derating for both
horizontal and vertical installations
Reaction time
<6.2 ms
POINTBus
POINTBus current, max
190 mA
Power dissipation, max
(1)
4.5 W
Power dissipation, typical
3.02 W
Thermal dissipation, max
15.38 BTU/hr
Isolation voltage
50V (continuous), Basic Insulation Type between field
side and system
No isolation between individual channels
Type tested at 707V DC for 60 s
Power bus, operating supply voltage
24V DC nom
Power bus, operating voltage range
19.2…28.8V DC
Power bus current (No Load), max
75 mA
Input filter time, OFF to ON
(2)
0…126 ms (in 6 ms increments)
Input filter time, ON to OFF
Terminal base screw torque
See terminal base specifications
Indicators
1 yellow lock status indicator
1 green/yellow power status indicator
8 I/O channel status indicators
8 A
6 A
-20 °C
(-4 °F)
40 °C
(104 °F)
55 °C
(131 °F)
4 A
Summary of Contents for Allen-Bradley 1734-IB8S
Page 1: ...POINT Guard I O Safety Modules Catalog Numbers 1734 IB8S 1734 OB8S 1734 IE4S User Manual ...
Page 4: ...4 Rockwell Automation Publication 1734 UM013J EN P July 2014 Summary of Changes Notes ...
Page 10: ...10 Rockwell Automation Publication 1734 UM013J EN P July 2014 Table of Contents ...
Page 14: ...14 Rockwell Automation Publication 1734 UM013J EN P July 2014 Preface Notes ...
Page 186: ...186 Rockwell Automation Publication 1734 UM013J EN P July 2014 Appendix D Safety Data Notes ...
Page 211: ......