Specifications
Publication 1794-SG002D-EN-P - May 2012
Select FLEX I/O Modules 33
FLEX I/O Digital Contact Output Modules (Relay)
The 1794-OW8 module provides 8 isolated Form A (normally open) contacts
capable of switching up to 2 A at up to 230V AC and 125V DC.
Do not attempt to increase load current or wattage capability beyond the
maximum rating by connecting two or more outputs in parallel. The slightest
variation in relay switching time may cause one relay to momentarily switch the
total load current. Apply only +24V DC power to the power terminals on the
terminal base. Make certain that all relay wiring is properly connected before
applying any power to the module.
Total current draw through the terminal base unit is limited to 10 A. Separate
power connections to the terminal base unit may be necessary.
The use of external fuses or a fused terminal base is required for individual
outputs.
Voltage, off-state output, max 31.2V DC
Leakage current, off-state
output, max
0.5 mA
Output delay time, OFF to ON,
max
(1)
0.5 ms
Output delay time, ON to OFF,
max
1.0 ms
Output surge current, max 4 A for 50 ms
repeatable every 2 s
1.5 A for 50 ms
repeatable every 2 s
Voltage, off-state input, max 5.0V DC
Current, on-state input, min 7.1 mA 5.5 mA @ 74V AC, 47 Hz
Current, off-state input, min 1.5 mA
Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.)
94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed
External DC supply voltage
range
10…31.2V DC
(includes 5% AC ripple)
External DC supply current
range
8 mA @ 10V DC
15 mA @ 19.2V DC
19 mA @ 24V DC
25 mA @ 31.2V DC
78 mA @ 10V DC
(1) 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
(2) Module outputs are not fused. Fusing is recommended. If fusing is desired, you must supply external fusing.
Use SAN-O MQ4-3A or Littelfuse 235-003.
(3) Outputs are electronically protected against overloads and shorts.
Digital DC Combination Modules
Specification 1794-IB10XOB6,
1794-IB10XOB6XT
(2)
1794-IB16XOB16P
(3)