1. Identifying SLC 500™ System Components

2. SLC 500 System Options
The SLC 500 line of processors comprises both fixed and modular processor styles.:

3. Fixed Hardware
Fixed SLC 500 processors have a built-in power supply with I/O modules in one unit. The following options are available with the fixed-hardware processor:
20, 30, or 40 digital I/O points
Two-slot expansion chassis
The following graphic shows a fixed SLC 500 processor with 20 I/O points and a two-slot expansion chassis

4. SLC 500 System

5. Modular Hardware
The following options are available with the modular-hardware processor:
Seven power supply types
Up to 4096 inputs and 4096 outputs
Five processor types
The following graphic shows a modular SLC 5/04 ™ processor:

6. SLC 500 System

7. Modular SLC 500 System Components
The modular SLC 500 system components include a power supply, processor, chassis, and I/O modules.

8. Power Supply
Power Supply: A component that provides system power requirements for the processor and I/O modules.
Seven power supplies, three AC-input power supplies and four DC-input power supplies, are available:

9. Power supply

10. Backplane Output Current
Power supply
Power Supply
Nominal Input Voltage
Backplane Output Current
1746-P1
120V or 220V AC
2A at 5V DC
1746-P2
5A at 5V DC
1746-P3
24V DC
3.6A at 5V DC
1746-P4
120V or 220V DC
10A at 5V DC
1746-P5
125V DC
1746-P6
48V DC
1746-P7
12V DC

11. Power supply
All power supplies have a light-emitting diode (LED) that indicates proper power supply. Power supplies are designed to withstand brief power losses (between 20 ms and 3 s) without affecting the operation of the system.

12. Processor
Processor: A component that acts as the brain of the system, receiving information from input devices via the I/O system, making decisions based on that information, and then sending information to the output devices via the I/O system.
SLC 500 processors offer a wide range of choices in memory, I/O capacity, instruction set, and communications ports. The following table lists characteristics of the modular processors:

13. SLC 500 Processor I/O Instruction Memory SLC 5/01 960 total 1K or 4K
Processor Type
I/O
Instruction Memory
SLC 5/01
960 total
1K or 4K
SLC 5/02
4096/4096 4K
SLC 5/03
8K or 16K
SLC 5/04
16K,32K, or 64K words
SLC 5/05

14. SLC 500 Processor

15. The following features are specific for each processor type:
Memory capacity
Complexity of available instruction set
Communications options
Time required to execute the control program

16. CPU
Run Position: Execute the program and energizes the outputs. No editing is allowed. Can not change the CPU mode using pc or programming device.
PROG Position: Program is not running and all output are de-energizes. Editing is allowed. Can not change the CPU mode using pc or programming device.
REM mode: Can change the CPU mode from Run to Prog. Mode using PC or programming device.

17. Chassis
Chassis: A hardware assembly that houses the processor and I/O modules.
SLC modular chassis provide the following functions:
Power distribution
Containment of I/O modules
Communication path between I/O modules and processor
SLC modular chassis are available in four sizes:
4-slot
7-slot
10-slot
13-slot :

18. Chassis 7 10

19. Chassis
A chassis requires a power supply (which connects to the chassis without a separate cable) to provide power to the processor and each I/O slot. Additionally, chassis can be connected together to increase the I/O available to a processor, as shown in the following graphic:

20. I/O Modules
I/O Modules: Electronic plug-in units used to interface with the input and output devices in the machine or process being controlled. Input modules receive data from input devices and send it to the processor. Output modules receive data from the processor and send it to output devices.

21. I/O modules I/O Module Function
Examples of devices that connect to module
Digital/discrete
Sends& receives on/off signals
Pushbuttons, indicators, photo eyes, starters
Analog
Sends& receives variable input/output signals
Temperature, voltage, speed current devices
Process
Provides process control
Temperature, weighing devices
Servo positioning
Provides positioning control
Hydraulic rams, encoders
Specialized
Provides specific functions
Flowmeters, clutch/brake systems

22. I/O Module

23. I/O Module 15 In

24. EEPROM Memory Module:
A module that can be inserted into a SLC 500 processor to maintain a copy of the project in case the processor experiences either of these situations:
Memory corruption
Extended power loss
Memory module information can be found under the Mem Module tab of the processor status file, as shown in the following graphic:

25. Signal Flow through an SLC 500 System:
The following graphic outlines the sequences of events from the activation of machine or process inputs to the energizing of machine or process output devices:

26. Communication
The following terms are associated with network communications:
Network: A series of stations (nodes) physically connected together.
Node: A device on a network capable of sending or receiving information.
Link: The path or physical means established for transmitting data between two or more locations.
Baud rate: A unit of signaling speed, across a communications link, equal to the number of signal events per second (bits per second).

27. Daisy-Chain Network Topologies Examples DH+ DH-485 Remote I/O
Each device has two sections of cable tied together
Each end has termination (resistor/capacitor)
Examples
DH+
DH-485
Remote I/O
SLC

28. Star Network Topologies Example Ethernet
All devices physically connected at one point
Example
Ethernet
PLC
PLC
PLC
PLC

29. A-B Communication Network Terms
serial }
RS-232
RS-422
Electrical Connections
RS-485 }
DH-485
REMOTE I/O
DF1
DH+

30. Networks - How to Decide on One?
Maximum number of devices
How many nodes are required for the application?
How many nodes should be reserved for future expansion?
Maximum network length
Usually specified as the physical cable distance from the first node to the last node on the network
Drop length is the length of cable from the main cable to the node
Device supported
Programmable controllers
Programming devices
Operator Interfaces
Other Computers - PCs, Workstations, Minis, Mainframes...

31. Data Highway Plus (DH+) Network:
A Data Highway Plus ™ (DH+) is a local area network designed to support remote programming for factory floor applications. A DH+ network has the following characteristics:
Uses baud rates up to kbit/s
Allows a maximum of 64 (0-77 octal) nodes
Allows a maximum network length of 3,048 m (10,000 ft) at 57.6 kbit/s
Communications speed is influenced by distance within the DH+ network.

32. Example: DH+ Network Channel 1 of an SLC 5/04 processor is used to connect to a DH+ network. An example of SLC 500™ processors on a DH+ network is shown in the following graphic:

33. DH 485 Network:
A DH 485 network is a local area network designed for plant floor applications. DH 485 connections enable you to go online to any processor on a DH 485 network from one connection point. A DH 485 network has the following characteristics:
Uses baud rates up to 19,200 bit/s
Allows a maximum of 32 (0-31 decimal) nodes
Uses a maximum cable length of 1.2 km (4,000 ft

34. Example: DH 485 Network Channel 1 of SLC 5/01, SLC 5/02, and SLC 5/03 processors is used to connect to the DH 485 Network. An example of SLC 500 ™ processors on a DH 485 network is shown in the following graphic

35. RS-232 (Serial) Connection:
An RS-232 serial port allows you to go online to a specific processor by connecting to the communications port of a computer:
Uses baud rates up to 19,200 bit/s
Requires physical connection to the processor to which you want to go online (cannot "see" other processors on the network)
Telephone and radio modems can be integrated into the RS-232 interface, thereby allowing communications over long distances.

36. Example: RS-232 Connection Channel 0 of SLC 5/03, SLC 5/04, and SLC 5/05 processors is used for an RS-232 connection. An example of an RS-232 connection is shown in the following graphic:

37. Universal Remote I/O Network:
Universal Remote I/O Link is a local area network designed to connect controllers to remote I/O chassis and a variety of intelligent devices such as operator interfaces and AC or DC drives.

38. Example: Universal Remote I/O An example of an SLC 5/04 processor with a 1747-SN scanner module on a Universal Remote I/O network is shown in the following graphic:

39. DeviceNet Network:
DeviceNet is a digital, multi-drop network to connect sensors, actuators and automation systems in general.

40. Example: DeviceNet Network An example of an SLC 500 processor with a 1747-SDN DeviceNet scanner module on a DeviceNet network is shown in the following graphic:

41. ControlNet Network:
A ControlNet network combines the functionality of Universal Remote I/O and Data Highway Plus. Control Net is a higher level, with up to 99 devices on a network. Generally uses coaxial cable with high level of shielding. It's purpose is interconnection of PLC units, HMI on the factory floor level up To upper management IT level. A ControlNet network has the following characteristics:
Uses baud rates up to 5 Mbit/s
Allows for up to 99 nodes
Allows data transfer distances of up to 30 km (18.6 miles) using fiber optic media

42. Example: ControlNet Network A SLC 500 processor with a 1747-SCNR ControlNet scanner module on a segment of a ControlNet network is shown in the following graphic:

43. Ethernet/IP Network
An EtherNet/IP network is a local area network (LAN) that provides communications between various devices at 10 Mbit/s. This network, available for SLC 5/05 processors, is the fastest SLC 500 communications option. An EtherNet/IP network has the following characteristics:

44. Ethernet/IP Network
Requires RJ45 connectors on both ends of a lOBaseT cable
Requires a PC Ethernet communications card
Uses baud rates from 10 Mbit/s to 100 Mbit/s
Allows unlimited nodes on the network with a maximum of 24 SLC 5/05 (32K and 64K) processor connections
Allows connections to the Internet via a 32-bit IP address

45. Ethernet/IP Network