Rockwell Automation 1746-XXXX SLC 500 Digital I/O Modules Installation Instructions User Manual
Page 39
SLC 500 Digital I/O Modules 39
Publication 1746-IN027D-EN-P - December 2012
Voltage, operating (V DC)
10…30 (source)
20.4...26.4 (source)
Backplane current
consumption
5V DC
0.046 A
0.135 A
0.250 A
24V DC
0.0 A
Signal delay, max resistive load
On = 1.0 ms
(7)
Off = 2.0 ms
On = 1.0 ms
(7)
Off = 2.0 ms
On = 0.1 ms
(7)
Off = 1.0 ms
Off-state leakage, max
(1)
1 mA
Load current, min
1 mA
Continuous current per point
(2)(3)
2.0 A @ 0…60 °C (140 °F)
2.0 A @ 0…60 °C (140 °F)
1.5 A @ 30 °C (86 °F)
1.0 A @ 60 °C (140 °F)
Continuous current per module
12.0 A @ 0…60 °C (140 °F)
8.0 A @ 0…60 °C (140 °F)
6.4 A @
0...60 °C (32...140 °F)
On-state voltage drop, max
1.0V @ 2.0 A
1.0V @ 2.0 A
1.0V @ 1.0 A
Surge current per point
(4)
4.0 A for 10 ms
4.0 A for 10 ms
4.0 A for 10 ms
Surge current per module
(4)
24.0 A for 10 ms
32.0 A for 10 ms
32.0 A for 10 ms
Electronic protection
Yes
No
No
(1)
To limit the effects of leakage current through solid state outputs, a loading resistor can be connected in parallel with your load. For transistor
outputs, 24V DC operation, use a 5.6 K
Ω, 1/2 W resistor.
(2)
Recommended surge suppression: For transistor outputs when switching 24V dc inductive loads, use a 1N4004 diode reverse-wired across the
load (also see footnote 3). Refer to the SLC 500 Modular Hardware Style User Manual, publicati
or more information on surge
suppression.
(3)
Fast off delay for inductive loads is accomplished with surge suppressors on the 1746-OB6EI, 1746-OBP8 series B and later, 1746-OB16E series B
and later, 1746-OBP16, and 1746-OVP16 modules. A suppressor at the load is not needed unless another contact is connected in series. If this is
the case, a 1N4004 diode should be reverse wired across the load. This defeats the fast turn-off feature.
(4)
Repeatability is once every 1 s at 30 °C (86 °F). Repeatability is once every 2 s at 60 °C (140 °F).
(5)
Removable terminal block.
(6)
Use the following ID Code when configuring your system with programming software or the HHT: 1746-OB6EI = 2619, 1746-OBP8 = 2721 and
1746-OBP12 = 2921.
(7)
Fast turn-off modules (1746-OB6EI, 1746-OBP8 Series B and later, 1746-OB16E Series B and later, 1746-OBP16, and 1746-OVP16) provide fast
OFF delay for inductive loads. Comparative OFF delay times for 1746-OB8/1746-OV8 and fast turn-off modules; when switching Bulletin
100-B110 (24W sealed) contactor, are: 1746-OB8/1746-OV8 OFF delay = 152 ms; fast turn-off modules OFF delay = 47 ms.
(8)
An external fuse can be used to protect this module from short circuits. Recommended fuse is SANO MQ4-3.15A, 5 x 20 mm.
(9)
A fused common and blown fuse LED indicator are provided on this module. See Fuse Protection and Blown Fuse Diagnostics.
(10)
Certified for Class 1, Division 2 hazardous location by CSA.
Specifications – 1746-OB6EI, 1746-OBP8, and 1746-OBP16
Attribute
Value
1746-OB6EI
(5)(6)
1746-OBP8
(5)(6)(8)
1746-OBP16
(5)(6)(9)(10)