Rockwell Automation 1746-XXXX SLC 500 Digital I/O Modules Installation Instructions - 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, publication
1747-UM011 , for 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)