Technical data

Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data
24V dc 4 Relay Sink/Source Output Module Cat. No. 1793-OW4 and -OW4S 119
Simplified Schematic of Relay Module
Load power can be obtained from a variety of sources, and can range
from +5V dc to 240V ac. Make certain that only 24V dc is applied to
the module power terminals on the module terminal base.
ATTENTION
!
Apply only +24V dc power to the power terminals
on the terminal base unit. 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 10A. Separate power connections to the
terminal base unit may be necessary.
Specifications - 1793-OW4 and -OW4S
Module Type Form A relay output
1793-OW4 - screw-cage terminations
1793-OW4S - spring-clamp terminations
Mounting Location DIN rail mounting
Number of Channels 1 group of 4
Output Range (at rated
power)
Resistive Inductive
5-30V dc @ 2.0A 5-30V dc @ 2.0A; L/R = 7ms
48V dc @ 0.5A 48V dc @ 0.5A; L/R = 7ms
125V dc @ 0.25A 125V dc @ 0.25A; L/R = 7ms
125V ac @ 2.0A 125V ac @ 2.0A; 15A make;
PF = cos θ = 0.4
240V dc @ 2.0A 240V ac @ 2.0A; 15A make;
PF = cos θ = 0.4
Maximum Power Ratings
(steady state)
ResistiveInductive
60W @ 30V dc 60VA @ 30V dc
24W @ 48V dc 24VA @ 48V dc
31W @ 125V dc 31VA @ 125V dc
250W @ 125V ac 250VA @ 125V ac
480W @ 240V ac 480VA @ 240V ac
Minimum Contact Load 100µA @ 100mV dc
Off-state Leakage Current 1mA @ 240V ac (through a snubber)
Initial Contact Resistance 30mΩ
Expected Contact Life 100,000 operations minimum at rated loads
Switching Frequency 0.3Hz maximum at rated load
Operate/Release Time 10ms maximum
Bounce Time 1.2ms (mean)
Delay Times Off to On
On to Off
8ms maximum (from valid output ON signal to relay
coil activation)
26ms (from valid output OFF signal to relay coil
deactivation)
Isolation Voltage
Between any 2 contacts
Customer load to logic
Customer load to 24V dc
Customer 24V dc to logic
2550V dc for 1s
2550V dc for 1s
2550V dc for 1s
850V dc for 1s
120V
ac
48V
dc
24V
dc
125V
dc
+24V
dc
dc
Return
40155
Representative Examples
of Various Relay Loads
Relay Load Contact Wiring
Fuse Recommendations 3.0A, 250V ac slow blow fuse (Littelfuse part
number 239003)
Flexbus Current 70mA maximum
Power Dissipation 5.0W @ 31.2V dc
Thermal Dissipation 17.1 BTU/hr @ 31.2V dc
Indicators 4 yellow channel status indicators
General Specifications
External dc Power
Voltage
Current
19.2-31.2V dc (5% ac ripple)
125mA maximum
Dimensions (HxWxD) 69mm x 55mm x 80mm (2.72in x 2.17in x 3.15in)
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
Shock Operating
Nonoperating
Vibration
0 to +55
o
C (32 to +131
o
F)
-40 to +85
o
C (-40 to +185
o
F)
5 to 95% noncondensing
Tested to 12g peak acceleration, 11(+1)ms pulse
width
Tested to 50g peak acceleration, 11(+1)ms pulse
width
Tested 2g @ 10-500Hz per IEC68-2-6
ConductorsWire Size
Category
1
12 gauge (4mm
2
) stranded wire
3/64 in (1.2mm) maximum insulation
2
Terminal Screw Torque 4-7 inch-pounds
Publications
Installation Instructions 1793-5.7
Agency Certification
1 Use this category information for planning conductor routing as described in publication
1770-4.1, “Wiring and Grounding Guidelines for Noise Immunity.”
Specifications - 1793-OW4 and -OW4S