In-Cabinet Distributed I/O

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1794 FLEX I/O

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Digital I/O Modules

The FLEX I/O module plugs into the terminal base, connecting to the I/O bus and field devices. Since there is no direct wiring to the I/O module, you can remove and insert modules under power, enabling you to change modules without disturbing field wiring, other I/O modules, or system power. This eliminates costly downtime and the inefficiencies of restarting a system.

Features


FLEX Digital AC Input Modules

Cat. No. Number of Inputs Voltage, On-State Input, Nom. Voltage, On-State Input, Min. Voltage, Off-State Input, Max. Current, Off-State Input, Max. Default Input Filter Time Power Dissipation, Max. Terminal Base Unit
1794-IA8 120V AC 65V AC 43V AC 2.9 mA Off to On: 8.4 ms
On to Off: 26.4 ms
4.5 W at 132V AC 1794-TBN, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD
1794-IA8I 8  Isolated
1794-IA16 16  120V AC 74V AC 20V AC 2.9 mA Off to On: 7.5 ms
On to Off: 26.5 ms
6.4 W at 132V AC 1794-TB3, 1794-TB3S, 1794-TBN⋆ 
1794-IM8 220V AC 159V AC 40V AC 2.6 mA 4.7 W at 264V AC 1794-TBN
1794-IM16 16 240V AC 159V AC 40V AC 2.6 mA 6 W at 264V AC 1794-TBN
⋆ Auxiliary terminal strips are required when using the 1794-TBN for the 1794-IA16.

FLEX Digital AC Output Modules

Cat. No. Number of Outputs Voltage, On-State Output, Nom.♣  Voltage Range, On-State Output♣  Current per Output, Max. Current per Module, Max. Power Dissipation, Max. Terminal Base Unit
1794-OA8 120V AC 85V AC…132V AC 500 mA at 55 °C∆ 
(5 mA min)
4.0 A (8 outputs at 500 mA) 4.1 W at 0.5 A
6.3 W at 0.75 A
6.3 W at 1.0 A
1794-TBNF, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBKD
1794-OA16 16  120V AC 85V AC…132V AC 500 mA at 55 °C
(5 mA min)
4.0 A (16 outputs at 250 mA) 4.7 W at 0.5 A 1794-TB3, 1794-TB2, 1794-TB3S, 1794-TBN, 1794-TBKD⋆ 
1794-OM8 220V AC 159V AC…264V AC 500 mA at 55 °C500 mA @ 55°C
(5 mA min)
4.0 A (8 outputs at 500 mA) 5 W at 0.5 A 1794-TBNF, 1794-TBN
1794-OM16 16  240V AC 159V AC…264V AC 500 mA at 55 °C♦ 
(50 mA min)
4.0 A 6 W at 264V AC 1794-TBNF, 1794-TBN
♣ The external AC supply voltage must be capable of a 50 A surge for 1/2 cycle at power-up.
∆ 750 mA per output @ 35 °C. 1.0 A on 4 nonadjacent outputs and 500 mA on the remaining 4 outputs @ 30 °C.
♦ If using 500 mA outputs, alternate wiring so that no two 500 mA outputs are next to each other.
⋆ Auxiliary terminal strips are required when using the 1794-TBN for the 1794-OA16.

FLEX Digital DC Input Modules

Cat. No.♠  Number of Inputs Voltage, On-State Input, Nom. Voltage Range, On-State Input Current, Off-State Input Power Dissipation, Max. Terminal Base Unit
1794-IG16 16  TTL 0V -0.2V DC0.8V DC 4.1 mA at 5V DC (3.7 mA nom) max 1.4 W at 5.5V DC 1794-TB3, 1794-TB3S
1794-IB8 8 current sinking 24V DC 10V DC…31.2V DC 1.5 mA min 3.5 W at 31.2V DC 1794-TB3, 1794-TB3S
1794-IB16 16 current sinking 24V DC 10V DC…31.2V DC 1.5 mA min 6.1 W at 31.2V DC 1794-TB3, 1794-TB3S
1794-IB16XT 2 W at 31.2V DC 1794-TB3, -TB3S, TB3SK
1794-IB16D 10V DC…31.2V DC 8.5 W at 31.2V DC 1794-TB32, 1794-TB32S
1794-IV16 16 current sourcing 24V DC 10V DC…31.2V DC 1.5 mA min 5.7 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBK
1794-IB32 32 current sinking (2 groups of 16) 24V DC 19.2V DC…31.2V DC 1.5 mA min 6.0 W at 31.2V DC 1794-TB32, 1794-TB32S
1794-IV32 32 current sourcing (2 groups of 16) 24V DC 19.2V DC31.2V DC 1.5 mA min 6.0 W at 31.2V DC 1794-TB32, 1794-TB32S
1794-IC16 16 current sinking 48V DC 30V DC…60V DC 1.5 mA min 6.4 W at 60V DC 1794-TB3, 1794-TB3S
1794-IH16 16 current sinking 125V DC 90V DC146V DC 0.8 mA min 6 W at 146V DC 1794-TB3, 1794-TB3S
♠ Catalog numbers ending with: (D) = includes diagnostics, (XT) = extreme environment.

FLEX Digital DC Output Modules

Cat. No.♠  Number of Outputs Voltage, On-State Output, Nom. Voltage Range, On-State Output Current, On-State Output, Max. Output Delay Time, Max. Power Dissipation, Max. Terminal Base Unit
1794-OG16 16  TTL 0 0V DC0.4V DC 24.0 mA per channel Off to On: 0.25 ms
On to Off: 0.5 ms
0.8 W at 5.5V DC 1794-TB3, 1794-TB3S
1794-OB8 8  current sourcing 24V DC 10V DC…31.2V DC 500 mA per channel, 4.0 A per module Off to On: 0.5 ms
On to Off: 1.0 ms
3.3 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD
1794-OB8EP 8  current sourcing 24V DC 19.2V DC…31.2V DC 2.0 A per channel, 10.0 A per module Off to On: 0.1 ms
On to Off: 0.1 ms
5.5 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBKD
1794-OB8EPXT 2.0 A per channel Off to On: 0.5 ms
On to Off: 1.0 ms
5 W at 31.2V DC 1794-TB2, -TB3, -TB3S, -TBN
1794-OB16 16  current sourcing 24V DC 10V DC…31.2V DC 500 mA per channel, 8.0 A per module Off to On: 0.5 ms
On to Off: 1.0 ms
5.3 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD
1794-OB16D Off to On: 0.1 ms
On to Off: 0.1 msOff to On: 0.1 ms
On to Off: 0.1 ms
4.8 W at 31.2V DC 1794-TB3, 1794-TB3S, 1794-TBKD
1794-OB16P 16  current sourcing 24V DC 10V DC…31.2V DC 500 mA per channel, 8.0 A per module Off to On: 0.5 ms
On to Off: 1.0 ms
5.0 W at 31.2V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD
1794-OB16PXT 1794-TB2, -TB3, -TB3S
1794-OB32P 32  current sourcing (2 groups of 16) 24V DC 10V DC…31.2V DC 500 mA per channel;
14.0 A per module⋆ 
Off to On: 0.5 ms
On to Off: 1.0 ms
5.3 W at 31.2V DC 1794-TB32, 1794-TB32S
1794-OV16 16  current sinking 24V DC 10V DC…31.2V DC 500 mA per channel, 8 A per module Off to On: 0.5 ms
On to Off: 1.0 ms
4.2W at 31.2V DC 1794-TB3, 1794-TB3S
1794-OV16P
1794-OV32 32  current sinking (2 groups of 16) 24V DC 10V DC31.2V DC 500 mA Off to On: 0.5 ms
On to Off: 1.0 ms
4.4 W at 31.2V DC 1794-TB32, 1794-TB32S
1794-OC16 16  current sourcing 48V DC 30V DC…60V DC @ 45 °C
55V DC @ 55 °C
500 mA per channel, 8 A per module Off to On: 0.5 ms
On to Off: 1.0 ms @ 25 °C; 2.0 ms @ 55 °C
3.7 W at 60V DC 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD
♠ Catalog Numbers ending with: (P) = Protected Outputs, (EP) = Electronic Fused, (D) = Diagnostic, (XT) = extreme environment.
⋆ 6.0 A total for channels 0…15; 8.0 A total for channels 16…31.

24V DC External Power - FLEX Digital DC Output Modules

Cat. No. External DC Supply Voltage Range External DC Supply Current Range
1794-OB8 10…31.2V DC (5% AC ripple) 10…35 mA
1794-OB8EP 19.2…31.2V DC (5% AC ripple) 20…35 mA
1794-OB8EPXT 19.2…31.2V DC (5% AC ripple) 55 mA
1794-OB16 10…31.2V DC (5% AC ripple) 20…65 mA
1794-OB16D 10…31.2V DC (5% AC ripple) 56…78 mA
1794-OB16P 10…31.2V DC (5% AC ripple) 25…75 mA
1794-OB16PXT 10…31.2V DC 35 mA
1794-OB32P 10…31.2V DC (5% AC ripple) 103…273 mA
1794-OV16 10…31.2V DC (5% AC ripple) 20…65 mA
1794-OV16P 10…31.2V DC (5% AC ripple) 20…65 mA
1794-OV32 10...31.2V DC (5% AC ripple) 50 mA
1794-OC16 30…60V DC (5% AC ripple) 13…27 mA
  

FLEX Digital DC Combination Input/Output Modules

Cat. No.♠  Voltage, On-State, Nom. Voltage, On-State, Range Inputs Outputs Power Dissipation, Max. Terminal Base Unit
Number of Inputs Default Input Delay Time‡  Current, Off-State Input, Max. Number of Outputs Output Delay Time♣  Output Currenty, Max.
1794-IB10XOB6 24V DC 10V DC…31.2V DC 10  current sinking Off to On: 0.25 ms§ 
On to Off: 0.25 ms§ 
1.5 mA 6 current sourcing OFF to ON:
0.5 ms
ON to OFF:
1.0 ms
2 A per output
10 A per module
6.0 W at 31.2V DC 1794-TB3, 1794-TB3S
1794-IB10XOB6XT 1794-TB2, 1794-TB3, -TB3S, -TB3SK
1794-IB16XOB16P 16  current sinking 16 current sourcing 0.5 A per output
8 A per module
7.0 W at 31.2V DC 1794-TB32, TB32S
♠ Catalog numbers ending with (P) = Protected Outputs, (XT) = extreme environment.
‡ Input On to Off delay is the time from the input signal dropping below the valid level to recognition by the module. Input Off to On delay time is the time from a valid input signal to recognition by the module.
§ 0.25 ms (default), 0.5 ms, 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, 32 ms. Selectable using configuration word 3. (Not selectable when used with the 1794-ASB adapter.)
♣ Output Off to On or On to Off delay is the time from the module issuing an output on or off until the output actually turns on or off.

24V DC External Power - FLEX Digital DC Combination Modules

Cat. No. External DC Supply Voltage Range External DC Supply Current Range
1794-IB10XOB6 10…31.2V DC (includes 5% AC ripple) 8 mA at 10V DC
15 mA at 19.2V DC
19 mA at 24V DC
25 mA at 31.2V DC
1794-IB10XOB6XT
1794-IB16XOB16P 10…31.2V DC (includes 5% AC ripple) 78 mA at 10V DC
  

FLEX Digital Contact Output Modules

The 1794-OW8 module provides 8 isolated Form A (normally open) contacts capable of switching up to 2.0 A at up to 230V AC and 125V DC. Load power can be obtained from a variety of sources and can range from +5V DC to 240V AC.

Cat. No.♠  Number of Outputs Relay Contact Rating Output Delay Time, Max. Power Dissipation, Max. External DC Supply Current Range Terminal Base Unit
1794-OW8 8  Isolated N.O. relay contact 250V AC, 2 A, 50/60 Hz, Resistive;
120/240V AC, 50/60 Hz, 1800 VA Make, 180 VA Break;
5…30V DC, 2 A, Resistive;
R150, 5...30V DC, 28 VA not to exceed 1 A below 28V DC
Off to On: 10 ms⋆ 
On to Off: 10 ms‡ 
5.5 W 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN and 1794-TBNF
1794-OW8XT
♠ Catalog Numbers ending with: (XT) = extreme environment.
⋆ Time from valid output on signal to relay energization by module.
‡ Time from valid output off signal to relay deenergization by module.