Brand

Allen-Bradley

Origin

USA

Outputs per Module

1 group of 8 Form A isolated (normally open) electromechanical relays

Module Location

Mounts on 1794-TB2, -TB3, -TB3S, -TBN and -TBNF Terminal Base Units. When using 1794-TBNF terminal base unit, use 3.0A, 250V ac slow-blow fuses (Littelfuse p/n no. 239003).

Off-State Leakage Current (max at 240V ac)

1 mA thru snubber circuit

Minimum Contact Load

100 μA at 100 mV dc

Output Voltage Range (load dependent)

5-30V dc @ 2.0A resistive
48V dc @ 0.25A resistive
60V dc @ 0.25A resistive
125V dc @ 0.22A resistive
240V ac @ 2.0A resistive

For use in Zone 2 potentially explosive atmosphere, voltages must be at or below 60V ac or 75V dc.

Output Current Rating (at rated power)

Resistive:
2.0A @ 30V dc
0.5A @ 48V dc
0.25A @ 125V dc
2.0A @ 240V ac
Inductive:
2.0A steady state @ 5-30V dc, L/R = 7ms
0.5A steady state @ 48V dc, L/R = 7ms
0.22A steady state @ 125V dc, L/R = 7ms
2.0A steady state @ 240V ac, PF = cos φ = 0.4

Power Rating (steady state)

250W max. for 125V ac resistive output
480W max. for 240V ac resistive output
60W max. for 30V dc resistive output
24W max. for 48V dc resistive output
31W max. for 125V dc resistive output
250VA max. for 240V ac inductive output
30W max. for 30V dc inductive output
12W max. for 48V dc inductive output
31VA max. for 125V dc inductive output

Output Signal Delay

Off to On: 10ms maximum (time from valid output on signal to relay energization by module)
On to Off: 10ms maximum (time from valid output off signal to relay deenergization by module)

Initial Contact Resistance

30mΩ

Switching Frequency

1 operation/3s (0.3Hz at rated load) max

Bounce Time

1.2ms (mean)

Expected Life of Electrical Contacts

Minimum 100,000 operations @ rated loads

Flexbus Current

60mA maximum

Power Dissipation

5.5W

Thermal Dissipation

18.8 BTU/hr maximum

Isolation Voltage

Tested to the following:
2500V dc for 1s output to Flexbus
2550V dc for 1s between contacts
2500V dc for 1s between relay groups
850V dc for 1s between contacts in a relay group

Fusing

Fusing of outputs is recommended. Use 3.0A, 250V ac slow-blow fuses (Littelfuse p/n no. 239003).

Category 24V dc Supply to Field Terminals

None

Keyswitch Position

4

Terminal Screw Torque

7-9 pound-inches (0.8Nm); NEMA 1794-TBN, -TBNF: 9 pound-inches (1.02Nm)

Dimensions (without module installed)

3.7H x 3.7W x 2.7D inches
94H x 94W x 68D mm

Weight

Approximately 0.24 kg (0.53 lbs)