- Bad communication ports
- Broken selector/key switches
- Dead batteries/Bad Battery connections
- Solid or Blinking RED OK Status Light
- Solid or Blinking RED RUN Status Light
- Solid or Blinking RED Fault Status Light
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Allen Bradley SLC 500 Repair
We offer extensive repairs for your SLC 500. We keep many spare parts in stock so that we can repair your SLC 500 as efficiently and effectively as possible. Our standard repair lead time is 2-4 weeks. However, we can often repair your unit much faster if necessary. We can repair most issues with your SLC 500 and if for some reason we cannot repair your unit we will do our best to offer a refurbished unit at the repair cost, so that you can get a working unit back as soon as possible!
- 2 Year DO Supply Warranty
- Fast repairs at low costs
- No surprises or up-charges for difficult repairs
- Standard lead time of 2-4 weeks
- Extensive quality control and testing
Get a repair quote
Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's
warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Hardware issues & error codes we repair
We repair all of the following hardware issues and error codes with your SLC 500 parts.
- Bad analog inputs or ouptus
- Bad digital input or outputs
- Bad relays (stuck on/off)
- Incorrect voltages on inputs or outputs
- Incorrect current on inputs or outputs
- DF1, DH-485, DH+, Profibus, Remote I/ (RIO) failures and more!
- Intermittent communication
- Solid RED/Blinkging RED communication lights
- Devicenet, Ethernet, ControlNet, RS232 ports.
- Missing CJC Jumpers
- Incorrect readings
- Failed inputs
- Dead power supplies
- Incorrect voltage
- Broken Plastic
- Poor Connections
- Bad Slots
Browse SLC 500 Repairs
Browse our catalog of repairable SLC 500 parts to get a quote.
1746sc-IA8I
The 1746sc-IA8I Isolated AC/DC Input Module is used with the Rockwell Automation SLC 500 series and has a 4 W max. Power Dissipation.
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1746SC-IB8I
This input module includes 8 isolated circuits, each with an input capability of 12 mA at 24 VDC and an offstate current of 1.8 mA. It features a power dissipation of 3 watts when operating at 24 VDC
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1746sc-IC8I
This isolated circuit-type discrete input module features eight inputs, each capable of handling a voltage rating of 48 VDC. The nominal input current is rated at 10 mA for efficient operation, and th
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1746sc-IM8I
This module supports individual input isolation, allowing for one point per common. It is rated for input frequencies between 47 Hz and 63 Hz. At 240 VAC, the nominal input current is 13.5 mA, while a
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1746sc-INI4I
This isolated analog input module allows for selectable channel filtering to adapt to either noise rejection or fast update needs. With a resolution of 16 bits for both voltage and current inputs, thi
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1746SC-INI4VI
This module operates within a backplane power consumption of 2.75 kW and requires 570 mA of current. It is equipped with programmable notch filters for input and boasts a normal mode rejection rate of
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1746sc-INO4I
The 1746sc-INO4I Analog Output Module is used with the Rockwell Automation SLC 500 series and has a 5 W max. Thermal Dissipation.
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1746SC-INO4VI
The 1746SC-INO4VI Analog Output Module is used with the Rockwell Automation SLC 500 series and has a 5 W max. Thermal Dissipation.
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1746sc-NI8U
The 1746sc-NI8U Universal Analog Input Module is used with the Rockwell Automation SLC 500 series and has a 3 W max. Thermal Dissipation.
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1746sc-NO8I
The Spectrum Controls 1746sc-NO8I module is an analog current output module made for Allen-Bradley SLC 500 systems. Eight analog current outputs are available on the 1746sc-NO8I module.
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About SLC 500
The SLC 500 series is a series of programmer controllers manufactured by Allen-Bradley that provides excellent features and abilities. These controllers can serve a wide range of application demands, including material handling, HVAC control, high-speed assembly operations, simple motion control, and small process control. The controllers use an advanced instruction set which includes indirect addressing as well as high-level math capabilities. For network connectivity, the SLC 500 controllers use onboard Ethernet, DH+, or DH 485 ports. There are also options for ControlNet, DeviceNet, and remote I/O communication. The controllers are manufactured in compact designs and they can fit in compact locations. The SLC 500 controllers offer a broad selection of I/O. They have over 60 modules to control discrete, analog, and temperature signals. They also support 3rd-party modules. For programming, the RSLogix 5000 software can be used.
The SLC 500 controllers use backup options for fault tolerance with the ControlNet module or backup communication module. This controller series offers single channel and single port controllers for regular operation. The controllers are available with a wide range of operating voltage. The operating voltage ranges from 5 to 265 Volts AC or 5 to 125 Volts DC, 24 Volts AC/DC sink voltage, and 85 to 132 Volts AC and 10 to 30 Volts DC. The programmer controllers are manufactured with different step responses which include 60 milliseconds input and 2.5 milliseconds output, 100 milliseconds input and 2.5 milliseconds output. The SLC 500 series controllers use flash, EEPROM, and Flash EPROM as backup memory. The controllers in this series use different processors like the 502, 503, 504, 505, and 501 processors. The controller series has been certified with the KC, C-Tick, UL, and CE standards. A one-year warranty is offered by the manufacturer from the date of installation.
Common issues with the SLC 500
Plastics, power supply, enclosure and mounting
Broken doors
Face plate
Mounting clips
Plastic card enclosure
Dead backplane
Connecting pins
Missing jumper caps
Power supply plastics
Power supply out 24v DC
Enclosure plastics
Enclosure backplane
Power supply LED power on indicator
Grounding terminals
Node address switches
Communications
RS-232 ports
DH+ ports
Ethernet port
DH485 ports
Faulty key switch
Lights
Flashing non recoverable fault
Solid non recoverable fault
Solid red DH+
LED indicators
I/O
Discrete output replacement relay or TRIAC
Discrete input replacement
Analog out
Analog in
RTD channel repair
Fused input/output replacement
fault/error codes
Minor Error
Channel 0 Modem Lost
Major error fault
Battery Low
Error code 21H