Product Description
Manufacturer: Allen-Bradley
Model/Part Number: 1794-OA8
Description: FlexLogix FLEX I/O AC Digital Output Module
Specifications:
| Attribute | Value |
|---|---|
| Number of Outputs | 8, nonisolated |
| Recommended Terminal Base | 1794-TBN, 1794-TBNF, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD, 1794-TBNK, 1794-TBNFK, 1794-TB3K, 1794-TB3SK |
| Output Voltage (Min) | 85V AC |
| Output Voltage (Nominal) | 120V AC |
| Output Voltage (Max) | 132V AC |
| Output Current Rating | 4.0 A (8 outputs @ 500 mA) |
| On-State Current (Min) | 5.0 mA per output |
| On-State Current (Max) | 500 mA per output @ 55 °C (131 °F) – Sufficient to operate an Allen-Bradley® Bulletin 500 NEMA size 3 motor starter 750 mA per output @ 35 °C (95 °F) 1.0 A on 4 non-adjacent outputs, 500 mA on the remaining 4 outputs @ 30 °C (86 °F) |
| On-State Voltage Drop (Max) | 1.0V @ 0.5 A |
| Surge Current | 7 A for 40 ms, repeatable every 8 seconds |
| Off-State Leakage Current (Max) | 2.25 mA |
| Isolation Voltage | 120V (continuous), field to backplane |
| Tested | 1250V AC for 60 s |
| Isolation Between Channels | None |
| Output Signal Delays | Off to On: 1/2 cycle max On to Off: 1/2 cycle max |
| Flexbus Current | 80 mA @ 5V DC |
| Power Dissipation (Max) | 4.1 W @ 0.5 A 6.3 W @ 0.75 A 6.3 W @ 1.0 A |
| Thermal Dissipation (Max) | 14.0 BTU/hr @ 0.5 A 21.2 BTU/hr @ 0.75 A 21.4 BTU/hr @ 1.0 A |
| Fusing | 1.6 A, 250V AC slow-blow, Littelfuse 23901.6; San-O SD6-1.6 (1.6 A fuses come installed in 1794-TBNF terminal bases) |
General Specifications:
| Attribute | Value |
|---|---|
| Terminal Base Screw Torque | Determined by the installed terminal base |
| Dimensions | 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) |
| Weight (Approx.) | 109 g (3.84 oz) |
| Indicators (Field Side Indication) | 8 yellow status indicators |
| External AC Power Supply Voltage | 120V AC |
| External AC Power Voltage Range | 85V – 132V AC |
| Keyswitch Position | 8 |
| Pilot Duty Rating | 5 A Inrush |
| North American Temperature Code | T4A – 1 |
| Enclosure Type Rating | None (open-style) |
| Wire Size | Determined by the installed terminal base |
| Wiring Category | 2 (on signal ports) |