Rockwell Automation 1734-IE4S POINT Guard I/O Safety Modules User Manual - Manual (Page 176)

176 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Appendix C Specifications
Safety Digital Output Module Specifications
Attribute 1734-OB8S Series B
Safety Output
Outputs per module 8
Output type Current sourcing
Output current (each output point), max 1 A @ 40 °C (104 °F)
0.5 A @ 55 °C (131 °F)
1734‐OB8S Series B temperature versus current per
output point ‐ derating for both horizontal and vertical
installations
Aggregate current of outputs per module
(1)
8 A (4 A per terminal base) @ 40 °C (104 °F)
2A (1A per terminal base) @ 55 °C (131 °F)
1734‐OB8S Series B temperature versus aggregate current
per module ‐ derating for both horizontal and vertical
installations
(1)
Pulse width 475 μs
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 detect)
Short-circuit protection Electronic
Reaction time <6.2 ms
POINTBus
POINTBus current, max 125 mA
Power dissipation, max
(2)
3.5 W
Thermal dissipation, max 11.96 BTU/hr
Power dissipation, typical (3) 2.5 W
Isolation voltage 50V (continuous), Basic Insulation Type between field
side and system
No isolation between individual channels
Type tested at 860V AC DC for 60 s
Power bus, operating supply voltage 24V DC nom, Class 2
1 A
0.5 A
-20 °C
(-4 °F) 40 °C
(104 °F) 55 °C
(131 °F)
8 A
2 A
-20 °C
(-4 °F) 40 °C
(104 °F) 55 °C
(131 °F)