Allen-Bradley 1734-OB8S - Page 141

Rockwell Automation Publication 1734-UM013C-EN-P - August 2010 141
Specifications Appendix D
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
Table 7 - 1734-IB8S and 1734-OB8S - Technical Specifications
Attribute 1734-IB8S 1734-OB8S
POINTBus
POINTBus current, max 175 mA 190 mA
Power dissipation 1.4 W 1.9 W
Thermal dissipation 4.8 BTU/hr 6.5 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
Input filter time, OFF to ON
(1)
(1) Input off-to-on filter time is the time from a valid input signal to recognition by the module. Input on-to-off time
is the time from a valid input signal to recognition by the module.
0…126 ms (in 6 ms increments)
Input filter time, ON to OFF
(1)
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
Table 8 - 1734-IB8S and 1734-OB8S Physical Specifications
Attribute Value
Keyswitch positions (left and right) 1734-IB8S: Key 1 = 8 (left); Key 2 = 1 (right)
1734-OB8S: Key 1 = 8 (left); Key 2 = 2 (right)
Pilot duty rating Not rated (1734-OB8S only)
North America temp code T4
Table 6 - 1734-OB8S - Technical Specifications
Attribute Value
8 A
6 A
-20 °C
(-4 °F)
40 °C
(104 °F)
55 °C
(131 °F)
4 A