Allen-Bradley 1794-IE8H Specifications Page 34
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Publication 1794-SG002D-EN-P - May 2012
26 Select FLEX I/O Modules
FLEX I/O Digital DC Output Modules
• 1794-OB8 and 1794-OB16 provide 16 sourcing 1/2 Amp outputs (8 for
the 1794-OB8) over a wide 10…31.2V DC input voltage range.
• 1794-OV16 is the sinking version of the 1794-OB16.
• 1794-OV32 is the 32 output version of the 1794-OV16.
• 1794-OC16 is the 48V DC version of the 1794-OB16.
• These modules are not fused. External fusing is strongly recommended or
use protected output modules. Module outputs are not fused. Fusing of
outputs is recommended. If fusing is desired, you must provide external
fusing.
For 1794-OB8, 1794-OB16, and 1794-OV16 use SAN-O
MQ4-800 mA fuse.
For 1794-OC16 use 2 A, 150V AC MQ2 normal fuse.
Digital DC Output Comparison
Specification 1794-OB8 1794-OB16 1794-OV16 1794-OV32 1794-OG16 1794-OC16
Voltage, on-state output,
nom
24V DC, sourcing 24V DC, sinking 0V DC 48V DC, sourcing
Voltage, on-state output,
min
10V DC 0V DC 30V DC
Voltage, on-state input,
max
31.2V DC 0.4V DC 60V DC @ 45 °C
55V DC @ 55 °C
Voltage drop, on-state
output, max
0.5V DC 0.2V DC — 1.0V DC @ 0.5 A
Terminal base unit 1794-TB2, 1794-TB3, 1794-TB3S,
1794-TB3K, 1794-TB3SK
1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK 1794-TB2,
1794-TB3,
1794-TB3S,
1794-TB3K,
1794-TB3SK
Current, on-state output,
min
1.0 mA per channel 0.15 mA per
channel
2.0 mA per channel
Current, off-state output,
max
500 mA per
channel
4 A per module
500 mA per channel
8 A per module
500 mA 24.0 mA per
channel
500 mA per channel
8 A per module
Leakage current,
off-state output, max
0.5 mA 1 mA 1.0 mA
Output surge current,
max
2 A for 50 ms, repeatable every 2 s — 4 A for 10 ms,
repeatable every 2 s
Output delay time, OFF
to ON, max
0.5 ms 0.25 ms 0.5 ms
(1)
Output delay time, ON to
OFF, max
1.0 ms 0.5 ms 1.0 ms @ 25 °C
2.0 ms @ 55 °C
(2)
External DC supply
voltage range
10…31.2V DC
(5% ripple)
4.5...5.5V DC
(includes 50 mV
p-p ripple)
30…60V DC
(5% ripple)
External DC supply
current range
10…35 mA 20…65 mA 50 mA 100 mA @ 5V DC 13…27 mA
Power dissipation, max 3.3 W @ 31.2V DC 5.3 W @ 31.2V DC 4.2 W @ 31.2V DC 4.4 W @ 31.2V DC 0.8 W @ 5.5V DC 3.7 W @ 60V DC
- Bulletin 1794 and 1797 1
- 1794-SG002D-EN-P 1
- Important User Information 2
- Table of Contents 3
- Table of Contents v 5
- Section 3.1 6
- Section 4.1 6
- Summary of Changes 7
- New and Updated 7
- Information 7
- 1794 FLEX I/O Overview 9
- General FLEX I/O and 11
- FLEX I/O XT Specifications 11
- 1794 FLEX I/O XT Overview 11
- Specify a FLEX I/O or 13
- FLEX I/O XT System 13
- Step 1 – Select: 15
- CIP Network Infrastructure 15
- Select a Network 16
- Device-Level Ring Topology 17
- ControlNet Network 18
- DeviceNet Network 19
- DNet In DNet Out 20
- Other Network Communication 21
- Other Networks – PROFIBUS DP 22
- Select FLEX I/O Modules 23
- Digital I/O Module Summary 24
- Digital Modules 26
- Derating Curve 27
- Modules Specifications 28
- 1794-IM8 Derating Curve 29
- Digital AC Output Comparison 29
- 1794-OM8 Derating Curve 31
- Digital DC Input Comparison 31
- 1794-IB32 Derating Curve 33
- 1794-IC16 Derating Curve 33
- Digital DC Output Comparison 34
- 1794-OB16P Derating Curve 36
- Surge Current — A 37
- 1794-IB16D Derating Curves 39
- FLEX I/O Analog 43
- Thermocouple and RTD 43
- Analog I/O Module Summary 44
- Analog 12 Input Module 47
- IMPORTANT 48
- Isolated Analog Input Modules 48
- 1794-IR8 RTD Input Module 51
- 1794-IR8 Derating Curve 52
- Thermocouple/mV Input Module 54
- = Safe operating area 55
- Combination Modules 57
- Analog Combination Module 58
- Analog Output Comparison 59
- Analog 4 Input Modules 60
- Analog 12 Output Module 62
- FLEX I/O Counter Modules 66
- 24V DC Input Frequency Module 68
- 2 Input Pulse Counter Module 71
- 4 Input Pulse Counter Module 72
- 1794-PS3 AC/DC 77
- 1794-PS13 AC/DC 77
- About the FLEX Ex I/O Systems 79
- FLEX Ex Typical 81
- Configurations 81
- Entity-Based Architecture 83
- Hazardous Area 83
- Designation 83
- Specify a FLEX Ex System 86
- 1797-BCNR Coax Barrier Module 90
- Select FLEX Ex I/O Modules 95
- (1) 1 ms default selectable 97
- (2) 1 ms default selectable 97
- Analog Modules 99
- Module Specifications 100
- Input Module 102
- HART Interface Modules 103
- FLEX Ex I/O Analog 104
- Output Modules 104
- Counter I/O Module 106
- Step 3 – Select: 111
- Terminal Base Wiring 111
- Diagrams 111
- Step 4 – Select: 113
- E Type Power Supply 114
- N Type Power Supply 114
- Understanding System Planning 114
- Assigning Power Supplies 116
- Hardened conduit 117
- Type of Power Input 118
- Mount the FLEX System 121
- Select Optional Accessories 123
- 1492-EA35 DIN Rail Locks 124
- 1794-LBL FLEX I/O Label Kit 124
- 1794-CJC2 124
- Step 5 – Select: 125
- ControlNet Ex Taps 126
- 1786-RG6 Coax Trunk Cable 127
- Related Documentation 129
- FLEX Ex I/O 133
- For More Information 133
- Rockwell Automation Support 136
- Documentation Feedback 136
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