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Omron S8M Product Manual

S8m series digital multicircuit protector
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See also: User Manual
Digital Multicircuit Protector
S8M
Complete Flexible DC Circuit Protector That
Has a Wide Array of Displays, Alarm
Outputs, and Other Digital Functions.
• Four circuit protectors in one package
• Simple setting of current tripping values for each branch outputs
in 0.1-A units
• Startup and shutdown sequence control
• Display and alarm functions (Input voltage, output current,
run time, and over-temperature)
• Outputs conform to UL Class 2 (at 24 VDC, S8M-CP04-RS
only)
• DIN Rail mounting
• Free Support Tool available
Note: Refer to Precautions for Safe Use on page 20.

Model Number Structure

Model Number Legend
Note: Not all combinations are possible. Please refer to the list of models in Ordering Information below.
S8M-CP04- @@
1 2
1. Communications
None:
Not supported
R:
Supported (RS-232)

Ordering Information

Note: For details on normal stock models, contact your nearest
OMRON representative.
Communications
UL Class 2 output
None
Not compliant
Supported (RS-232C)
Not compliant
Compliant
This Datasheet describes only the minimum setting operations required when using the S8M for the first time.
Refer to the S8M User's Manual (Cat. No. Z241), when making further settings.
2. UL Class 2 Output (at 24 VDC)
None:
S:
Recommended Power Supplies
Series name
Model number
S8VS
S8M-CP04
S8M-CP04-R
S8M-CP04-RS
S8VM
Note: When selecting the power supply, be sure to include the
Not compliant
Compliant
Model number
S8VS-06024@@
S8VS-09024@@
S8VS-12024@@
S8VS-18024@@
S8VS-24024@@
S8VM-05024@@
S8VM-10024@@
S8VM-15024@@
S8VM-30024C
S8VM-60024C
internal power consumption of the S8M (approx. 10 W) and not
just the power consumption of the load.
Digital Multicircuit Protector
S8M
1

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  • Page 1: Model Number Structure

    Note: Refer to Precautions for Safe Use on page 20. Model Number Structure Model Number Legend Note: Not all combinations are possible. Please refer to the list of models in Ordering Information below. S8M-CP04- @@ 1. Communications 2. UL Class 2 Output (at 24 VDC)

  • Page 2: Specifications

    Tripping alarm out- Transistor output 30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max. Alarms Overvoltage Setting range: 20.0 to 28.8 V (in 0.1-V units), alarm output Undervoltage Setting range: 18.0 to 26.4 V (in 0.1-V units), alarm output...
  • Page 3 Note: 1. A voltage drop will occur in the S8M. Consider the voltage drop at the output. 2. When selecting the power supply, be sure to include the internal power consumption of the S8M (approx. 10 W) and not just the power consumption of the load.

  • Page 4: Block Diagrams

    S8M-CP04-R/-RS only S8M-CP04-RS only Cutoff Cutoff Current-detection Current-detection resistor circuit circuit resistor Thermal Fuse fuse Voltage Display Temperature DC branch output 1 Switch detection circuit detection Current- limiting DC input circuit power supply Power supply Processing Cutoff Current-detection Cutoff Current-detection...
  • Page 5 13. 2. Configured from independent circuits, and either sinking or sourcing applications are possible. 3. Indicators 1 to 4 will not light except when the current is being displayed. 4. Press for at least 3 s to enable operation.

  • Page 6: Engineering Data

    Ambient temperature ( C) Note: 1. Internal parts may occasionally be deteriorated or damaged. Do not use the S8M in areas outside the derating curve (i.e., in the area shown by shading A in the above graph). 2. If there is a derating problem, use forced air cooling.
  • Page 7 2. Take adequate measures to ensure proper heat dissipation to increase the long-term reliability of the S8M. 3. Install the S8M so that the air flow circulates around it, because the S8M is designed to radiate heat by means of natural air flow.
  • Page 8 2. Outputs are cut off using semiconductor relays and electrical insulation is not provided. 3. The output will remain OFF and the alarm display and alarm output will not be cleared even if power is restored. The S8M must be reset to restore operation.

  • Page 9: Alarm Functions

    (Refer to page 14 for the setting procedure.) Run time alarm The time that the power is turned ON is calculated as the S8M run time and notification is provided using the (Refer to Chart 3.) alarm display and output (ALM) if the preset time is reached. The alarm display will alternate between the run (See note 1.)

  • Page 10: Other Functions

    (Refer to page 14 for the setting procedure.) Shutdown sequence The cutoff timing for branch outputs 1 to 4 can be set individually to offset the cutoff timing of load devices for the (Refer to Chart 6.) external tipping input or to enable an emergency stop.
  • Page 11 Test Mode Protection Level Parameter Initialization Press for 3 s. Press for 3 s. Level Selection Yes, initialize. Note: Settings are displayed in order for branch outputs 1 to 4. Specific branch output settings have been omitted. Digital Multicircuit Protector...

  • Page 12: Mode Descriptions

    The following diagram illustrates mode transitions for the S8M. When branch output. the S8M is turned ON for the first time, it will enter Setting Mode. First By default, all outputs will be OFF. set the required initial settings for the parameters in Setting Mode Test Mode is thus used to turn ON branch outputs as required.

  • Page 13: Run Mode

    Run Mode is used for normal operation. When the input power is described below. turned ON and the mode was Run Mode or Setting Mode the last time the input power was turned OFF, the S8M will start in Run Mode Lit green Normal connection status and connecting the branch outputs will be started.

  • Page 14: Setting Mode

    Setting Mode Setting Mode is used to set S8M parameters. Settings can be read or changed while operation continues. The various parameters can be selected as shown below. Abnormal Current Tripping Value The current at which a branch output is cut off.

  • Page 15: Test Mode

    The branch outputs that are to normal operation. Reading or changing parameter settings and other be used are set to be connected in Test Mode. The operation to turn operations can be restricted in three levels.

  • Page 16: List Of Alarms

    3 C for at least 5 s. Note: Alarms will be displayed in order of priority if more than one alarm occurs at the same time. Order of priority: A10, A11, A20, A21, A22, A23, A30.

  • Page 17: Alarm Display

    1 or 2 bits V A kh C s Error detection Vertical parity and BCC Note: Alarms will be displayed in order of priority if more than one Parity check None, even, or odd alarm occurs at the same time.
  • Page 18 Dimensions Note: All units are in millimeters unless otherwise indicated. Two, M4 screws with square washers Eight, M3.5 screws with 86.5 square washers 4.35 Note: The image is the S8M-CP04-RS Model. Digital Multicircuit Protector...

  • Page 19: End Plate

    DIN Rail (Order Separately) Note: All units are in millimeters unless otherwise indicated. Mounting Rail (Material: Aluminum) PFP-100N ±0.15 PFP-50N ±0.3 ±0.15 15 (5) (See note.) 1,000 (500) (See note.) Note: Values in parentheses are for the PFP-50N. Mounting Rail (Material: Aluminum) PFP-100N2 29.2...

  • Page 20: Safety Precautions

    Here, Arrhenius Law applies, i.e., the life will be halved for each rise of 10 C or the life will be doubled for each drop of 10 C. The life of the S8M can thus be increased by reducing its internal temperature.

  • Page 21: Dielectric Strength Test

    The startup delay will not operate when a relay or other device is tripping. used for ON/OFF control on the output side of the S8M, so a tripping operation may occasionally occur. If the capacity of the input power supply is too small compared with...

  • Page 22: Troubleshooting

    Troubleshooting If the S8M is not operating properly, check the items listed in the following table before requesting repairs. Stage Observed problem Possible cause Remedy Installation The S8M was installed on a DIN Rail, The S8M's bottom latch is not mounted...
  • Page 23 Digital Multicircuit Protector...
  • Page 24 CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted. IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE...

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S8m-cp04S8m-cp04-rS8m-cp04-rs

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