AB Quality | 1746-P3 | 1746-2.38, SLC 500 Modular Chassis and Power Supply, Product

ALLEN-BRADLEY
SLC 500
Product Data
SLC 500 Modular Chassis and Power Supplies
Features and Benefits of
Chassis and Power Supplies
Chassis
The SLCt 1746 modular chassis houses the processor and the I/O modules.
Features and benefits of the modular chassis series include:
Feature
Benefit
Modules easily slide into chassis
No tools are required for module
slots.
installation.
Up to 3 chassis can be
Locally the processor can address
interconnected.
up to 30 slots.
Four chassis sizes are available to
Selection can be suited to your
choose from.
system I/O requirements.
Power Supplies
Each chassis requires a power supply to provide power to the processor and
each I/O slot. You should consider future system expansion when selecting a
power supply. Power supply features and benefits include:
Feature
Benefit
All power supplies have an LED
Monitoring this LED can tell you at
that indicates proper supply power.
a glance whether your supply is
operating properly.
Supplies have a hold-up time (the
Power supplies are designed to
time the system is operational
withstand brief power losses
during a brief power loss) typically without affecting the operation of
between 20 milliseconds and
the system. Actual duration of the
3 seconds.
power supply hold-up time depends
on the number, type, and state of the
I/O modules.
On ac power supplies, you can
No special wiring is required.
select either 120V or 240V
operation by setting a jumper.
This product data supplies you with information you need to consider when
setting up your control application. It provides specifications and dimension
drawings for the SLC 1746 modular chassis and power supplies. It also
provides worksheets that you can use to calculate the power supply best
suited to your application and the amount of heat you can expect the
components in your system to generate under normal operating conditions.
What's Inside...
Hardware Overview
Specifications
System Layout Recommendations
Heat Dissipation
Dimension Drawings
Reference Table and Graphs
AllenBradley Support
Worksheets
2
Page
3
5
9
11
15
17
20
21
Product Data
SLC 500 Modular Chassis and Power Supplies
Hardware Overview
Chassis Sizes
SLC modular chassis are available in the following slot sizes:
Description
Catalog Number
See Page
4slot chassis
1746A4
15
7slot chassis
1746A7
15
10slot chassis
1746A10
16
13slot chassis
1746A13
16
Chassis Interconnect Cables
You can connect up to three chassis using chassis interconnect cables.
Chassis do not include interconnect cables. Below is a description of
available cables:
Description
152.4 mm (6 in.) Chassis Interconnect Cable - Use this ribbon cable when
linking modular chassis up to 152.4 mm (6 in.) apart in an enclosure.
914.4 mm (36 in.) Chassis Interconnect Cable - Use this cable when linking
modular chassis from 152.4 mm (6 in.) up to 914.4 mm (36 in.) apart in an
enclosure.
Catalog Number
1746C7
1746C9
Chassis Interconnect Cable Installation
Cables must exit the right side of the first chassis and enter the left side of the
second chassis. Cables are keyed for proper installation.
1746C9
Cable
1746C7 Cable
3
Product Data
SLC 500 Modular Chassis and Power Supplies
Power Supply Selection and Installation
When configuring a modular system, you must have an individual power
supply for each chassis. The power supply provides power to the processor
and each I/O card. Careful system configuration will result in the best
performance. Excessive loading of the power supply can cause reduced
power supply life or a power supply shutdown. The following pages can
help you select the power supply best suited for each chassis in your modular
SLC control system.
Note that the power supply does not occupy a slot in the chassis. It mounts
on the left side with two screws.
4
Product Data
SLC 500 Modular Chassis and Power Supplies
Power Supply Specifications
Description
1746P1
1746P2
1746P3
1746P4
1746P5
Line Voltage
85-132/
170-265V ac
47-63 Hz
85-132/
170-265V ac
47-63 Hz
19.2-28.8V dc
85-132/
170-265V ac
47-63 Hz
90-146V dc
Typical Line Power
Requirement
122 VA @ 120V ac
135 VA @ 240V ac
165 VA @ 120V ac
180 VA @ 240V ac
90 VA
190 VA @ 120V ac
230 VA @ 240V ac
85VA
Maximum Inrush Current
20A
20A
20A
45A
20A
Internal Current Capacity
2A at 5V dc
0.46A at 24V dc
5A at 5V dc
0.96A at 24V dc
3.6A at 5V dc
0.87A at 24V dc
10.0A at 5V dc
➁
2.88A at 24V dc
5A at 5V dc
0.96A at 24V dc
Fuse Protection
1746F1 or
➂
equivalent
1746F2 or
➃
equivalent
1746F3 or
➄
equivalent
Nonreplaceable
fuse is soldered in
place.
Nonreplaceable
fuse is soldered in
place.
24V dc User Power
Current Capacity
200 mA
200 mA
Not Applicable
1A
24V dc User Power
Voltage Range
18-30V dc
18-30V dc
Not Applicable
20.4-27.6V dc
18-30V dc
Ambient Operating
Temperature Rating
0°C to 60°C (32°F to 140°F)
0°C to 60°C
(32°F to 140°F)
no derating
0°C to 60°C
➅
(32°F to 140°F)
Storage Temperature
-40°C to 85°C (-40°F to 185°F)
Humidity Rating
5-95% (noncondensing)
Wiring
two #14 AWG wires per terminal (maximum)
Certification
UL/CSA/CE
Hazardous Environment
Certification
Class I
Division 2
➀
➅
➁
200 mA
➀ Power supply fuse is intended to guard against fire hazard due to short circuit conditions and may not protect the supply from damage under these conditions.
➁ The combination of all output power (5 volt backplane, 24 volt backplane, and 24 volt user source) cannot exceed 70 Watts.
➂ Equivalent fuses: 250V3A Fuse, Nagasawa ULCS61ML3, or BUSSMANN AGC 3
➃ Equivalent fuses: 250V3A Fuse, SANO SOC SD4, or BUSSMANN AGC 3
➄ Equivalent fuses: 125V5A Fuse, Nagasawa ULCS61ML5, or BUSSMAN AGC 5
➅ Current capacity derated 5% above 55°C.
Wiring, Input Voltage Selection, and Fuse Location
The power supply terminals accept two #14 AWG wires and are marked as
shown in the figures on the following page. On ac power supplies, a jumper
is provided to make the 120/240V selection. Place the jumper to match the
input voltage. Note that the jumper location on the 1746-P4 supply is
different from the jumper location on the P1 and P2 power supplies.
5
Product Data
SLC 500 Modular Chassis and Power Supplies
Fuse placement for 1746-P1, P2, and P3 supplies is shown below. Refer to
the Power Supply Specification table on page 5 for fuse replacement
information. Note that the 1746-P4 and -P5 power supplies fuse is
non-replaceable.
!
ATTENTION: Make jumper selection before applying power.
Hazardous voltage is present on exposed pins when power is
applied.
POWER
POWER
Fuse
Fuse
User
Power
Jumper
Selection
100/120 Volts
200/240 Volts
PWR OUT +24V dc
NOT USED
PWR OUT COM
NOT USED
120/240V ac
+ 24V dc
V ac NEUT
dc NEUT
CHASSIS GROUND
CHASSIS GROUND
1746P3
1746P1 and P2
POWER
Jumper
Selection
85-132V ac
User
Power
POWER
PWR OUT +24V dc
PWR OUT COMMON
85-132V ac
User
Power
JUMPER
170-265V ac
170-265V ac
PWR OUT +24V dc
PWR OUT COM
+125V dc
dc NEUT
L185-132/170-265
CHASSIS GROUND
L2 NEUTRAL
1746P4
6
CHASSIS GROUND
1746P5
Product Data
SLC 500 Modular Chassis and Power Supplies
Power Supply Selection Example
Select a power supply for chassis 1 and chassis 2 in the control system below.
(The worksheet for this example is on page 8.)
Chassis 1
DH485 Network
Chassis 2
?
HHT
?
IBM PC
1747PIC
1747AIC
1747AIC
Chassis 1
Slot Numbers
?
Slot
0
1 2 3
Description
Catalog
Number
Power Supply
at 5V dc
(Amps)
Power Supply
at 24V dc
(Amps)
0
Processor Unit
1747L511
0.35
0.105
1
Input Module
1747IV8
0.05
NA
2
Transistor Output Module
1746OB8
0.135
NA
3
Triac Output Module
1746OA16
0.37
NA
Peripheral Device
HandHeld Terminal
1747PT1
NA
NA
Peripheral Device
Isolated Link Coupler
1747AIC
NA
0.085
0.905
0.190
Total Current:
➀
➀ Power Supply 1746P1 is sufficient for Chassis #1. The Internal Current Capacity" for this power supply is
2 Amps at 5V dc, 0.46 Amps at 24V dc.
Chassis 2
Slot Numbers
?
Slot
0
1
2
3 4 5 6
Description
Catalog
Number
Power Supply
at 5V dc
(Amps)
Power Supply
at 24V dc
(Amps)
0
Processor Unit
1747L514
0.35
0.105
1
Output Module
1746OW16
0.17
0.180
2
Combination Module
1746IO12
0.09
.07
3, 4, 5, 6
Analog Output Modules
1746NO4I
0.22
(4 x 0.055)
0.780
(4 x 0.195)
Peripheral Device
Isolated Link Coupler
1747AIC
NA
0.085
Peripheral Device
Interface Converter
1746PIC
NA
NA
Total Current:
0.83
1.22
➀
➀ Power Supply 1746P4 is sufficient for Chassis #2. The Internal Current Capacity" for this power supply is
10 Amps at 5V dc, 2.88 Amps at 24V dc; not to exceed 70 Watts. (This configuration = 33.43 Watts,
i.e., [5V x 0.83A] + [24V x 1.22A] = 33.43W)
7
Product Data
SLC 500 Modular Chassis and Power Supplies
Example Worksheet for Selecting 1746 Power Supplies for the Example System
If you have a multiple chassis system, make copies of the Worksheet for Selecting a Power Supply found on page 21. For a detailed
list of device load currents, refer to pages 17 and 18.
Procedure
1. For each slot of the chassis that contains a module, list the slot number, the catalog number of the module, and its 5V and 24V
maximum currents. Also include the power consumption of any peripheral devices that may be connected to the processor
other than a DTAM, HHT, or PIC the power consumption of these devices is accounted for in the power consumption of the
processor.
1
Chassis Number: _______
2
Chassis Number: _______
Catalog
Number
slot
slot
slot
slot
slot
slot
slot
slot
0
_______
1
_______
2
_______
3
_______
_______
_______
_______
_______
Peripheral
Device:
Catalog
Number
Maximum Currents
5V
24V
L511
_________
IV8
_________
OB8
_________
OA16
_________
_________
_________
_________
_________
0.350 0.105
______________
0.050
______________
0.135
______________
0.370
______________
______________
______________
______________
______________
slot
slot
slot
slot
slot
slot
slot
slot
_________
AIC
______________
0.085
Peripheral
Device:
_______
0
1
_______
2
_______
3
_______
4
_______
5
_______
6
_______
_______
Maximum Currents
5V
24V
_________
L514
OW16
_________
NO4I
_________
NO4I
_________
NO4I
_________
NO4I
_________
IO12
_________
_________
______________
0.350 0.105
0.170 0.180
______________
0.055 0.195
______________
0.055 0.195
______________
0.055 0.195
______________
0.055 0.195
______________
0.090 0.070
______________
______________
_________
AIC
______________
0.085
2. Add the power supply loading currents of
all the system devices ( at 5V and 24V).
______________
Total Current: 0.905 0.190
Total Current:
______________
0.830
1.220
When using the 1746P4 power supply, use the formula below to calculate total
power consumption of all the system devices (at 5V and 24V). Note that the 1746P4
Chassis total power supply loading currents cannot exceed 70 Watts. If you are not
using a 1746P4 power supply, proceed to step 3.
The user current @ 24V listed below is for example only. The current required
depends on the application.
Total current
@ 5V
Total current
@ 24V
User Current
@ 24V
Total Power
Total current
@ 5V
Total current
@ 24V
User Current
@ 24V
Total Power
( 0.905 x 5V)+ ( 0.190 x 24V)+ ( 0.500 x 24V) = 21.085 W ( 0.830 x 5V)+ ( 1.220 x 24V)+ ( 0.500 x 24V) = 45.43 W
3. Compare the Total Current required for the chassis with the Internal Current Capacity of the power supplies.
To select the proper power supply for your chassis, make sure that the power supply loading current for the chassis is less than the
internal current capacity for the power supply, for both 5V and 24V loads.
Catalog Number 1746P1
Catalog Number 1746P2
Catalog Number 1746P3
Catalog Number 1746P4
Catalog Number 1746P5
Required Power Supply for this Chassis:
1746
Internal Current Capacity
5V
24V
2.0A |
0.46A
5.0A |
0.96A
3.6A |
0.87A
10.0A |
2.88A (70 Watts maximum)
5.0A |
0.96A
P1
Consider future system expansion when selecting a power supply.
8
Required Power Supply for this Chassis:
1746
P4
Product Data
SLC 500 Modular Chassis and Power Supplies
System Layout
Recommendations
Selecting Enclosures
The enclosure protects the equipment from atmospheric contamination.
Standards established by the National Electrical Manufacturer’s Association
(NEMA) and International Electrotechnical Commission (IEC) define
enclosure types based on the degree of protection an enclosure will provide.
Select a NEMA- or IEC-rated enclosure that suits your application and
environment. The enclosure should be equipped with a disconnect device.
To calculate the heat dissipation of your controller, refer to Calculating Heat
Dissipation on page 12.
Spacing Considerations
Follow the recommended minimum spacing shown below to allow for
convection cooling within the enclosure. Cooling air in the enclosure must
be kept within a range of 0°C to +60°C (+32°F to +140°F).
➌
➌
1746C9 Cable
➊
➊
1746C7 Cable
➋
➋
➌
➍
➋
1746C9
Cable
➋
➊
1746C9
Cable
Recommended Spacing
➊
15.3 to 20 cm (6 to 8 inches) when using the 1746C9 cable
Note: When making a vertical connection between two A13 chassis with a
1746C9 cable, you must limit the space to 15.3 cm (6 inches) for the C9 cable
to reach from chassis to chassis.
➋
Greater than 10.2 cm (4 inches)
➌
Greater than 15.3 cm (6 inches)
➍
7.7 to 10.2 cm (3 to 4 inches) when using the 1746C7 cable
➌
9
Product Data
SLC 500 Modular Chassis and Power Supplies
Grounding
In solid-state control systems, grounding helps limit the effects of noise due
to electromagnetic interference (EMI). Ground connections should run from
the chassis and power supply on each controller and expansion unit to the
ground bus. Exact connections will differ between applications. An
authoritative source on grounding requirements for most installations is the
National Electrical Code. Also, refer to Allen-Bradley Industrial Automation
Grounding and Wiring Guidelines, Publication Number 1770-4.1.
The figure below shows you how to run ground connections from the chassis
to the ground bus. Each chassis in the figure uses a different grounding
method. Both methods are acceptable, but we recommend use of the ground
bus because it reduces the electrical resistance at the connection.
1746Power Supply
SLC 500
Single Point Ground
#8 AWG
WIRE
Ground Bus
➀ Use 10 AWG wire; keep
length as short as possible.
Earth
Ground
➀
➀
Ground Bus
#10 AWG
Wire
1746Power Supply
SLC 500
➀
10
Product Data
SLC 500 Modular Chassis and Power Supplies
Special Considerations in dc Applications
!
ATTENTION: Any voltage applied to the 1746-P3 dc NEUT
terminal will be present at the SLC logic ground and the
processor DH-485 port. To prevent unwanted potentials across
the logic ground of the controller and/or damage to the SLC
chassis, the dc NEUTRAL of the external dc power source must
be either isolated from the SLC chassis ground, or connected to
earth ground. See the figure below:
1746P3
External dc Power Source
SLC 500 Chassis
Door
Not Used
Not Used
+24V dc
+24V dc
Processor
DH485
Port
SLC Logic Ground
dc Neut
dc Neut
Chassis
Ground
Chassis
Ground
•
Earth Ground
Heat Dissipation
A jumper wire is recommended between
the dc NEUT and Chassis Ground of the
external power source.
Earth Ground
Preventing Excessive Heat
For most applications, normal convection cooling will keep the controller
components within the specified operating range (0–60°C). Proper spacing
of components within the enclosure is usually sufficient for heat dissipation.
In some applications, a substantial amount of heat is produced by other
equipment inside or outside the enclosure. In this case, place blower fans
inside the enclosure to assist in air circulation and to reduce “hot spots” near
the controller.
Additional cooling provisions might be necessary when high ambient
temperatures are encountered.
Important: Do not bring unfiltered outside air into the enclosure. It may
introduce harmful contaminants that could cause improper
operation or damage to components. In extreme cases, you may
need to use air conditioning to protect against heat build-up
within the enclosure.
11
Product Data
SLC 500 Modular Chassis and Power Supplies
If you suspect heat build-up may be a problem, you can calculate the heat
dissipation of your SLC control system. The following information can help
you to make this calculation.
Calculating Heat Dissipation
To calculate the heat dissipation of your SLC controller you must consider
two things:
• the maximum heat dissipated (with field power applied) by the processor,
all I/O and specialty modules, and any peripheral devices for each chassis.
• the heat dissipated by the power supply. This is determined by the
maximum load on the power supply of the processor, each I/O and
specialty module, peripheral device, and device drawing power directly
off the power supply via the “POWER OUT” terminals.
You calculate maximum heat dissipation by using one of these methods:
• calculated watts method
• total watts method
Use calculated watts if you know exactly how many outputs and inputs on
each card will be active at any given time. This method will give you a
lower, more accurate heat dissipation calculation than the total watts method.
With this method, use the formula below for calculating the heat dissipation
of each module. Then use these values in step 1 of the Example Worksheet
for Calculating Heat Dissipation on page 14.
(points energized x watts per point) + minimum watts = heat dissipation of module
Use total watts if you are not sure how many points on a module will be
energized at any time. Total watts is the watts per point (with all points
energized) plus the minimum watts. Total watts generated by each module
are provided in the table on pages 17 and 18.
Once you have determined which method you will use to calculate the heat
dissipation of your modules, see the Example Worksheet for Calculating
Heat Dissipation on page 14. This worksheet shows you how to calculate
the heat dissipation for the example SLC control system on page 13.
12
Product Data
SLC 500 Modular Chassis and Power Supplies
Example Heat Dissipation Calculation
If your controller consisted of the following hardware components, you
would calculate heat dissipation as shown in the worksheet on page 14.
DTAM
Chassis 1
Chassis 2
Peripheral Device
Slot
0
1
2
3
Slot 4
5
6
7
User Power
to Peripheral
The following table details the total watts dissipated by the modules and
peripheral devices in the above SLC 500 controller. The numbers were taken
from the tables on pages 17 and 18.
Chassis 1
Chassis 2
Slot Number
Catalog Number
Min. Watts
Max. Watts
Slot Number
Catalog Number
Min. Watts
Max. Watts
0
1747L511
1.75
1.75
4
1746IA16
0.425
4.800
1
1746BAS
3.750
3.80
5
1746IA16
0.425
4.800
2
1746IA8
0.250
2.40
6
1746OW16
5.170
5.500
3
1746OV8
0.675
6.90
7
1746OW16
5.170
5.700
Peripheral
Device
1747DTAM
2.500
2.50
NA
NA
NA
NA
User Power to
Peripheral
NA
NA
NA
NA
NA
2.400
➁
➀
NA
➀ This output card uses 5.5 Watts because only 10 points are on at any one time. Using the calculated watts formula (number of points energized x watts per
point) + minimum watts = heat dissipation of module the calculated watts for the 1746OW16 module is 5.5W: (10 points X .033) + 5.17 = 5.5W.
➁ The user power on the 1746P1 power supply for Chassis 2 is being used to power a peripheral (100 mA at 24V dc).
13
Product Data
SLC 500 Modular Chassis and Power Supplies
Example Worksheet for Calculating Heat Dissipation
Procedure:
1.
Chassis 2
Chassis 3
17.35
_________
20.8
_________
_________
Heat Dissipation
Calculate the heat dissipation for each chassis without the power supply.
A.
Write in the watts (calculated watts or total watts, see page 12) dissipated by the processor,
I/O and specialty modules, and any peripheral devices attached to the processor. Then, for
each chassis, add these values together.
Chassis 1
Cat. No.
Ht. Dis.
_________|_________
L511
1.75
_________|_________
BAS
3.8
_________|_________
IA8
2.4
OV8
6.9
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
peripheral device: _________|_________
DTAM
2.5
peripheral device: _________|_________
Total:
_________
17.35
B.
2.
Chassis 1
Chassis 2
Cat. No.
Ht. Dis.
Chassis 3
Cat. No.
Ht. Dis.
_________|_________
IA16
4.8
_________|_________
IA16
4.8
_________|_________
OW16
5.5
OW16
_________|_________
5.7
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
20.8
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
Place the heat dissipation for each chassis into the appropriate columns.
Calculate the heat dissipation for each power supply.
A.
Calculate the power supply loading for each chassis (write in the minimum watts) for each
device (see pages 17 and 18) and then, for each chassis, add these values together.
Important: If you have a device connected to user power, multiply 24V by the current used.
Include user power in the total power supply loading.
Chassis 1
Cat. No. Min. Ht. Dis.
L511
1.75
_________|_________
BAS
3.750
_________|_________
IA8
0.250
_________|_________
OV8
0.675
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
user power: _________|_________
DTAM
2.5
peripheral device: _________|_________
peripheral device: _________|_________
8.925
Total:
_________
B.
Chassis 2
Cat. No. Min. Ht. Dis.
_________|_________
IA16
0.425
IA16
0.425
_________|_________
OW16
5.17
_________|_________
OW16
5.17
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
2.4
_________|_________
_________|_________
13.59
_________
Chassis 3
Cat. No. Min. Ht. Dis.
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
Use the power supply loading for each chassis and the graphs on page 19 to determine the
power supply dissipation. Place the power supply dissipations into the appropriate columns.
3.
Add the chassis dissipation to the power supply dissipation.
4.
Add across the columns for the total heat dissipation of your SLC 500 controller.
5.
Convert to BTUs/hr. Multiply the total heat dissipation of your SLC 500 controller by 3.414.
13.0
15.0
_________
_________
_________
30.35 + ________
35.8 + _______ =
________
Total heat dissipation of the SLC 500 controller:
14
66.15 W
_________
x 3.414
225.84 BTUs/hr
________
Product Data
SLC 500 Modular Chassis and Power Supplies
Dimension Drawings
4Slot Modular Chassis
11 Dia.
(0.433)
1.0
(0.04)
5.5 Dia.
(0.217)
70
(2.76)
➌➋ ➊
158
(6.22)
140 171
(5.51) (6.73)
171
(6.73)
Left Side View
140
(5.51)
14
(0.55)
5.5 Dia
(0.217)
45
(1.77)
215
(8.46)
145
(5.71)
235
(9.25)
261
(10.28)
millimeters
(inches)
Front View
7Slot Modular Chassis
11 Dia.
(0.433)
175
(6.89)
5.5 Dia.
(0.217)
1.0
(0.04)
➌ ➋ ➊
171
140
(5.51) (6.73)
158
(6.22)
171
(6.73)
Left Side View
140
(5.51)
14
(0.55)
45
(1.77)
5.5 Dia
(0.217)
320
(12.60)
145
(5.71)
340
(13.39)
366
(14.41)
Front View
➊
➋
➌
Dimensions for power supply catalog number 1746P1
Dimensions for power supply catalog number 1746P2, P3, and P5
Dimensions for power supply catalog number 1746P4
15
Product Data
SLC 500 Modular Chassis and Power Supplies
10Slot Modular Chassis
11 Dia.
(0.433)
5.5 Dia.
(0.217)
140
(5.51)
1.0
(0.04)
55
(2.17)
➌ ➋ ➊
158
(6.22)
140
(5.51)
171
(6.73)
Left Side View
14
(0.55)
5.5 Dia
(0.217)
140
(5.51)
145
(5.71)
Front View
435
(17.13)
140
(5.51)
455
(17.91)
481
(18.94)
13Slot Modular Chassis
11 Dia.
(0.433)
5.5 Dia.
(0.217)
105
(4.13)
140
(5.51)
55
(2.17)
➌➋ ➊
158
(6.22)
140
(5.51)
5.5 Dia
(0.217)
171
(6.73)
Front View
14
(0.55)
140
(5.51)
540
(21.26)
560
(22.05)
586
(23.07)
1.0
(0.04)
millimeters
(inches)
171
(6.73)
➊
➋
➌
16
Dimensions for power supply catalog number 1746P1
Dimensions for power supply catalog number 1746P2, P3, and P5
Dimensions for power supply catalog number 1746P4
Left Side View
145
(5.71)
140
(5.51)
Product Data
SLC 500 Modular Chassis and Power Supplies
Reference Table and Graphs
Power Supply Loading Reference Table
Use the table below to calculate the power supply loading and heat
dissipation for each chassis in your SLC modular application. Definitions of
some of the terms used in the table are provided on the next page.
Hardware
Component
Processors
Input Modules
Output Modules
Maximum
Current in
Amps
at 5V
Maximum
Current in
Amps
at 24V
1747L511
0.350
0.105
NA
1.75
1.75
1747L514
0.350
0.105
NA
1.75
1.75
1747L524
0.350
0.105
NA
1.75
1.75
1747L532
0.500
0.175
NA
2.90
2.90
1747L541
1.000
0.200
NA
4.00
4.00
1747L542
1.000
0.200
NA
4.00
4.00
1747L543
1.000
0.200
NA
4.00
4.00
1746IA4
0.035
-
0.270
0.175
1.30
1746IA8
0.050
-
0.270
0.250
2.40
1746IA16
0.085
-
0.270
0.425
4.80
1746IB8
0.050
-
0.200
0.250
1.90
1746IB16
0.085
-
0.200
0.425
3.60
1746IB32
0.106
-
0.200
0.530
6.90
1746IC16
0.085
-
0.220
0.425
3.95
1746IG16
0.140
-
0.020
0.700
1.00
1746IH16
0.085
-
0.320
0.675
3.08
1746IM4
0.035
-
0.350
0.175
1.60
1746IM8
0.050
-
0.350
0.250
3.10
1746IM16
0.085
-
0.350
0.425
6.00
1746IN16
0.085
-
0.350
0.425
6.00
1746ITB16
0.085
-
0.200
0.425
3.625
1746ITV16
0.085
-
0.200
0.425
3.625
1746IV8
0.050
-
0.200
0.250
1.90
1746IV16
0.085
-
0.200
0.425
3.60
1746IV32
0.106
-
0.200
0.530
6.90
1746OA8
0.185
-
1.000
0.925
9.00
1746OA16
0.370
-
0.462
1.850
9.30
1746OAP12
0.370
-
1.000
1.850
10.85
1746OB8
0.135
-
0.775
0.675
6.90
1746OB16
0.280
-
0.338
1.400
7.60
1746OB32
0.452
-
0.078
2.260
4.80
1746OBP8
0.135
-
0.300
0.675
3.08
1746OBP16
0.250
-
0.310
1.250
6.21
1746OG16
0.180
-
0.033
0.900
1.50
1746OV8
0.135
-
0.775
0.675
6.90
1746OV16
0.270
-
0.388
1.400
7.60
1746OV32
0.452
-
0.078
2.260
4.80
1746OVP16
0.250
-
0.310
1.250
6.21
1746OW4
0.045
0.045
0.133
1.310
1.90
1746OW8
0.085
0.090
0.138
2.590
3.70
1746OW16
0.170
0.180
0.033
5.170
5.70
1746OX8
0.085
0.090
0.825
2.590
8.60
Catalog Numbers
Watts per Point
Minimum
Watts
Total
Watts
17
Product Data
SLC 500 Modular Chassis and Power Supplies
Hardware
Component
Input & Output
Modules
Specialty Modules
Peripheral Devices
Maximum
Current in
Amps
at 5V
Maximum
Current in
Amps
at 24V
1746IO4
0.030
0.025
0.270 per input pt.
0.133 per output pt.
0.750
1.60
1746IO8
0.060
0.045
0.270 per input pt.
0.133 per output pt.
1.380
3.00
1746IO12
0.090
0.070
0.270 per input pt.
0.133 per output pt.
2.130
4.60
1747ASB
0.375
-
NA
1.875
1.875
1746BAS
0.150
➀
0.040
NA
3.750
3.800
1747DCM
0.360
-
NA
1.800
1.800
1747DSN
0.900
-
NA
4.500
4.500
1746FIO4I
0.055
0.150
NA
3.760
3.800
1746FIO4V
0.055
0.120
NA
3.040
3.100
1746HSCE
0.320
-
NA
1.600
1.600
1747KE
0.150
➀
0.040
NA
3.750
3.800
1746NI4
0.025
0.085
NA
2.170
2.20
1746NIO4I
0.055
0.145
NA
3.760
3.80
1746NIO4V
0.055
0.115
NA
3.040
3.10
1746NO4I
0.055
0.195
NA
4.960
5.00
1746NO4V
0.055
0.145
NA
3.780
3.80
1746NR4
0.050
0.050
NA
1.500
1.500
1747NT4
0.060
0.040
NA
0.800
0.800
1747SN
0.900
-
NA
4.500
4.500
1747AIC
0
0.085
NA
2.000
2.000
1747DTAM
0
➁
NA
2.500
2.500
1747PT1 Series A & B
0
➁
NA
2.500
2.500
1747PIC
0
➁
NA
2.000
2.000
Catalog Numbers
Watts per Point
Minimum
Watts
Total
Watts
➀ When using the BAS or KE modules to supply power to an AIC, the AIC draws its power through the module.
Add 0.085A (the current loading for the AIC) to the BAS or KE module's power supply loading value at 24V dc.
➁ The 24V dc loading values of the HHT, PIC, and DTAM are included in the 24V dc loading value of the
processor.
NA (Not Applicable)
Watts per point — the heat dissipation that can occur in each field wiring
point when energized at nominal voltage.
Minimum watts — the amount of heat dissipation that can occur when there
is no field power present.
Total watts — the watts per point plus the minimum watts (with all points
energized).
18
Product Data
SLC 500 Modular Chassis and Power Supplies
Power Supply Heat Dissipation Graphs
18
16
14
12
10
8
6
4
2
0
0
5
10
15
20
1746P2 Power Supply Change in Power
Dissipation due to Output Loading
20
18
16
14
12
10
8
6
4
2
0
25
0
10
20
30
40
50
60
Power Supply Loading (Watts)
Power Supply Loading (Watts)
1746P3 Power Supply Change in Power
Dissipation due to Output Loading
Power Supply Dissipation (Watts)
Power Supply Dissipation (Watts)
Power Supply Dissipation (Watts)
1746P1 Power Supply Change in Power
Dissipation due to Output Loading
25
20
15
10
5
0
1746P4 Power Supply Change in Power
Dissipation due to Output Loading
25
20
15
10
5
0 5 10 15 20 25 30 35 40
0
0 10 20 30 40 50 60 70 80
Power Supply Loading (Watts)
Power Supply Dissipation (Watts)
Power Supply Dissipation (Watts)
Use the graphs below for determining the power supply dissipation in step 2
of the Example Worksheet for Calculating Heat Dissipation.
Power Supply Loading (Watts)
1746P5 Power Supply Change in Power
Dissipation due to Output Loading
20
18
16
14
12
10
8
6
4
2
0
0
10
20
30
40
50
60
Power Supply Loading (Watts)
19
Product Data
SLC 500 Modular Chassis and Power Supplies
AllenBradley Support
In today’s competitive environment, when you buy any product, you expect
that product to meet your needs. You also expect the manufacturer of that
product to back it up with the kind of customer service and product support
that will prove you made a wise purchase.
As the people who design, engineer, and manufacture your Industrial
Automation Control equipment, Allen-Bradley has a vested interest in your
complete satisfaction with our products and services.
Allen-Bradley offers support services worldwide, with over 75 Sales/Support
Offices, 512 authorized Distributors and 260 authorized Systems Integrators
located throughout the United States alone, plus Allen-Bradley
representatives in every major country in the world.
Contact your local Allen-Bradley representative for:
• sales and order support
• product technical training
• warranty support
• support service agreements
20
Product Data
SLC 500 Modular Chassis and Power Supplies
Worksheets
Blank Worksheet for Selecting a 1746 Power Supply
(For a detailed list of device load currents, refer to SLC 500 Modular Chassis and Power Supplies, Publication Number 17462.38.
pages 17 and 18.)
Procedure
1.
Required Power Supply
For each slot of the chassis that contains a module, list the slot number, the catalog number of the
module, and its 5V and 24V maximum currents. Also include the power consumption of any
peripheral devices that may be connected to the processor other than a DTAM, HHT, or PIC the
power consumption of these devices is accounted for in the power consumption of the processor.
Chassis Number: ______
slot
slot
slot
slot
slot
slot
slot
slot
slot
slot
slot
slot
slot
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
Peripheral Device:
2.
Maximum Currents
5V
24V
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
_______|_______
Catalog Number
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______
_______|_______
Add the power supply loading currents of all the system devices ( at 5V and 24V).
Total Current: ______________
When using the 1746P4 power supply, use the formula below to calculate total power consumption
of all the system devices (at 5V and 24V). Note that the 1746P4 Chassis total power supply loading
currents cannot exceed 70 Watts. If you are not using a 1746P4 power supply, proceed to step 3.
Total current
@ 5V
(
3.
Total current
@ 24V
x 5V) + (
User Current
@ 24V
x 24V) + (
x 24V) =
Total
Power
W
Compare the Total Current required for the chassis with the Internal Current Capacity of the power
supplies. To select the proper power supply for your chassis, make sure that the power consumption
for the chassis is less than the internal current capacity for the power supply, for both 5V and 24V loads.
Catalog Number 1746P1
Catalog Number 1746P2
Catalog Number 1746P3
Catalog Number 1746P4
Catalog Number 1746P5
Internal Current Capacity
5V
24V
2.0A |
0.46A
5.0A |
0.96A
3.6A |
0.87A
10.0A |
2.88A (70 Watts maximum)
5.0A |
0.96A
For this chassis, you need the following power supply.
1746
Consider future system expansion when selecting a power supply.
21
Product Data
SLC 500 Modular Chassis and Power Supplies
Blank Worksheet for Calculating Heat Dissipation
Procedure
1.
Chassis 2
Chassis 3
________
________
________
________
________
________
_______ +
_______ +
______ =
Heat Dissipation
Calculate the heat dissipation for each chassis without the power supply.
A.
Write in the watts (calculated watts or total watts, see page 12) dissipated by the processor,
I/O and specialty modules, and any peripheral devices attached to the processor. Then, for
each chassis, add these values together.
Chassis 1
Cat. No.
Ht. Dis.
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
peripheral device: _________|_________
peripheral device: _________|_________
Total:
_________
B.
2.
Chassis 1
Chassis 2
Cat. No.
Ht. Dis.
Chassis 3
Cat. No.
Ht. Dis.
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
Place the heat dissipation for each chassis into the appropriate columns.
Calculate the heat dissipation for each power supply.
A.
Calculate the power supply loading for each chassis: write in the minimum watts for each
device (see pages 17 and 18) and then, for each chassis, add these values together.
Important: If you have a device connected to user power, multiply 24V by the current used.
Include user power in the total power supply loading.
Chassis 1
Cat. No. Min. Ht. Dis.
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
user power: _________|_________
peripheral device: _________|_________
peripheral device: _________|_________
Total:
_________
B.
Chassis 2
Cat. No. Min. Ht. Dis.
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
Chassis 3
Cat. No. Min. Ht. Dis.
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________|_________
_________
Use the power supply loading for each chassis and the graphs on page 19 to determine the
power supply dissipation. Place the power supply dissipations into the appropriate columns.
3.
Add the chassis dissipation to the power supply dissipation.
4.
Add across the columns for the total heat dissipation of your SLC 500 controller.
5.
Convert to BTUs/hr. Multiply the total heat dissipation of your SLC 500 controller by 3.414.
Total heat dissipation of the SLC 500 controller:
22
_________ W
x 3.414
________ BTUs/hr
Product Data
SLC 500 Modular Chassis and Power Supplies
Notes
23
SLC, SLC 500, and DTAM are trademarks of Allen–Bradley Company, Inc.
IBM is a registered trademark of International Business Machines Corporation
AllenBradley has been helping its customers improve productivity and quality for 90 years.
AB designs, manufactures and supports a broad range of control and automation products
worldwide. They include logic processors, power and motion control devices, manmachine
interfaces and sensors. AllenBradley is a subsidiary of Rockwell International, one of the
world's leading technology companies.
With major offices worldwide.
Algeria • Argentina • Australia • Austria • Bahrain • Belgium • Brazil • Bulgaria • Canada • Chile • China, PRC • Colombia • Costa Rica • Croatia • Cyprus • Czech
Republic • Denmark • Ecuador • Egypt • El Salvador • Finland • France • Germany • Greece • Guatemala • Honduras • Hong Kong • Hungary • Iceland • India •
Indonesia • Israel • Italy • Jamaica • Japan • Jordan • Korea • Kuwait • Lebanon • Malaysia • Mexico • New Zealand • Norway • Oman • Pakistan • Peru • Philippines
• Poland • Portugal • Puerto Rico • Qatar • Romania • Russia-CIS • Saudi Arabia • Singapore • Slovakia • Slovenia • South Africa, Republic • Spain • Switzerland •
Taiwan • Thailand • The Netherlands • Turkey • United Arab Emirates • United Kingdom • United States • Uruguay • Venezuela • Yugoslavia
World Headquarters, AllenBradley, 1201 South Second Street, Milwaukee, WI 53204 USA, Tel: (1) 414 3822000 Fax: (1) 414 3824444
Publication 17462.38 December 1996
Supersedes Publication 17462.38 - May 1995
Copyright 1996 AllenBradley Company, Inc. Printed in USA
Download PDF