Technical data

68 Rockwell Automation Publication 1769-TD006C-EN-P - March 2012
1769 Compact I/O Modules Specifications
1769-OB8
Compact solid state 24V DC source, high-current output module
Table 55 - Technical Specifications - 1769-OB8
Attribute 1769-OB8
Outputs 8 (4 points/group)
Voltage category 24V DC source
Operating voltage range 20.4…26.4V DC
Output delay, on 0.1 ms
Output delay, off 1.0 ms @ 60 °C max load 2 A, min V in 20.4V
1.5 ms @ 60 °C max load 1mA, min V in 20.4V
Current draw @ 5.1V 145 mA
Heat dissipation, max 2.20 W
Off-state leakage current, max
(1)
1.0 mA @ 26.4V DC
On-state current, min 1.0 mA
On-state voltage drop, max 1.0V DC @ 2 A
Current per point, max 2.0 A @ 60 °C (140 °F)
Current per module, max 8.0 A @ 60 °C (140 °F)
Surge current
(2)
4 A for 10 ms, repeatable every 2 s
Isolation voltage Verified by one of the following dielectric tests: 1200V AC for 1 s or 1697V DC for 1 s, output
point to bus, and group to group
75V DC working voltage (IEC Class 2 reinforced insulation)
Weight, approx 280 g (0.61 lb)
Dimensions (HxWxD), approx 118 x 35 x 87 mm (4.65 x 1.38 x 3.43 in.)
Height with mounting tabs 138 mm (5.43 in.)
Slot width 1
Module location DIN rail or panel mount
Power supply 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4
Power supply distance rating 8 modules
DC+
DC-
OUT 6
OUT 4
NC
NC
NC
OUT 2
OUT 0
OUT 7
OUT 5
+VDC 2
NC
NC
NC
OUT 3
OUT 1
+VDC 1
CR
CR
CR
CR
DC COM
2
DC COM
1
CR
CR
DC -
DC+
1769-OB8
VCC
ASIC
VDC
OUT
COM
Simplified Output Circuit Diagram
Logic Side User Side