Omron S8M DATASHEET

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 curr ent tripping values for each bra nch 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 Lege nd

Note: Not all combinations are possible. Please refer to the list of models in Ordering Information below.

S8M-CP04- @@

1. Communications

None: Not supported R: Supported (RS-232)

2. UL Class 2 Output (at 24 VDC)

None: Not compliant S: Compliant

Ordering Information

Note: For details on normal stock models, contact your nearest

OMRON representative.

Communications UL Class 2 output Model number

None Not compliant S8M-CP04 Supported (RS-232C) Not compliant S8M-CP04-R

Compliant S8M-CP04-RS

Recommended Power Supplies

Series name Model number

S8VS S8VS-06024@@

S8VS-09024@@ S8VS-12024@@ S8VS-18024@@ S8VS-24024@@

S8VM S8VM-05024@@

S8VM-10024@@ S8VM-15024@@ S8VM-30024C S8VM-60024C

Note: 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.

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.

Digital Multicircuit Protector S8M 1

Specifications

■Ratings/Characteristics

Item Model S8M-CP04 S8M-CP04-R S8M-CP04-RS Number of branches 4 I/O

characteristics

Functions Tripping Abnormal voltage

Rated input voltage 24 VDC (19.2 to 26.4 VDC) Allowable input current 17.0 A max. 16.0 A max. Maximum tripping output current

(per branch output) Internal voltage drop (See note 1.) 0.5 VDC max. (at 4.0 A) 0.7 VDC max. (at 3.8 A) Output leakage current 10 mA max. Power

consumption (See note 2.)

Alarms Ove rvoltage Setting range: 20.0 to 28.8 V (in 0.1-V units), alarm output

Temperature Temperature Setting range: 25 to 80

Display Input voltage Display range: 17.0 to 30.0 V

External tripping input 19.2 to 30 VDC, minimum signal width: 10 ms, tripping within 20 ms of input Startup sequence Can be enabled/disabled for each branch output, setting range: 0.0 to 99.9 s in 0.1-s units. Shutdown sequence Can be enabled/disabled for each branch output, setting range: 0.0 to 99.9 s in 0.1-s units. Communications None Supported (RS-232C) Sampling pe r i od 1 ms

4 branches output, normal operation

4 branches output, tripping operati on

tripping Abnormal current

tripping Tripping alarm out-

put

Undervoltage Setting range: 18.0 to 26.4 V (in 0.1-V units), alarm output Overcurrent Setting range: 0.5 to 4.0 A (in 0.1-A units), alarm output Setting range: 0.5 to 3.8 A (in 0.1-A

Run time Setting range: 0.0 to 99.9 kh (in 0.1-kh units), alarm output

Alarm output Transistor output

Over-temperature output

Output current Branch output display range: 0.0 to 4.0 A

Run time Display range: 0.0 to 99.9 kh

Temperature Display range:

4.0 A 3.8 A

10 W max. (at 4.0 A) 15 W max. (at 3.8 A)

3 W max.

28.8 V (fixed), tripping alarm output

Setting range: 0.5 to 4.0 A (in 0.1-A units), tripping alarm output

Transistor output 30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max.

(The alarm output is disabled if the time is set to 0.0 kh.)

30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max.

°C, over-temperature output

Transistor output 30 VDC max., 50 mA max., leakage current: 0.1 mA max., residual voltage: 2 V max.

Display accuracy: 2% rdg

Peak output current display range:0.0 to 10.0 A Total current display range: 0.0 to 40.0 A Display accuracy: 5% FS (4 A)

Display accuracy: 2% rdg

Display accuracy: 2

±1 digit max.

−10 to 100°C °C ±1 digit max.

±1 digit max.

Setting range: 0.5 to 3.8 A (in 0.1-A units), tripping alarm output

units), alarm output

2 Digital Multicircuit Protector S8M

Item Model S8M-CP04 S8M-CP04-R S8M-CP04-RS Other Ambient operating temperature Refer to the derating curve in Engineering Data (with no condensation or icing) (See note 3.)

Storage temperature

−25 to 65°C

Ambient operating humidity 25% to 85% (storage humidity: 25% to 90%) Dielectric strength 1.0 kVAC for 1 min (between all charged sections and all non-charged sections; detection cur-

rent: 20 mA) 500 VAC for 1 min (between all I/O and I/O signals/communications; detection current: 20 mA) 500 VAC for 1 min (between all I/O signals and communications; detection current: 20 mA) 500 VAC for 1 min (between input signals and all output signals; detection current: 20 mA)

Insulation resistance 100 M

Ω min. (between all charged sections and all non-charged sections) at 500 VDC Ω min. (between all I/O and I/O signals/communications) at 500 VDC

100 M 100 M

Ω min. (between all I/O signals and communications) at 500 VDC

100 M

Ω min. (between input signals and all output signals) at 500 VDC

Vibration resistance 10 to 55 Hz, 0.375-mm single amplitude for 2 h each in X, Y, and Z directions Shock resistance EMI Conducted

150 m/s

, 3 times each in ±X, ±Y, and ±Z directions

Conforms to EN 61204-3 Class B

Emission

Radiated Emission Conforms to EN 61204-3 Class B EMS Conforms to EN 61204-3 High severity levels Approved standards UL: UL 508 (Listing), UL 60950-1

cUL: CSA C22.2 No. 107.1 cUR: CSA No. 60950-1 EN/VDE:EN 50178 (= VDE 0160), EN 60950-1

(= VDE 0805 Teil 1)

UL: UL 508 (Listing, Class 2:

Per UL 1310), UL60950-1 cUL: CSA C22.2 No. 107.1 cUR: CSA No. 60950-1 EN/VDE:EN 50178

(= VDE 0160),

EN 60950-1

(= VDE 0805 Teil 1)

Weight 400 g max.

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.

3. Refer to Engineering Data on page 6 for details.

Digital Multicircuit Protector S8M 3

Connections

■Block Diagrams

S8M-CP04-R/-RS only

S8M-CP04-RS only

DC input power supply

Communications terminals RS-232C

Tripping alarm output

Alarm output

Overtemperature output

External tripping input

SD RD SG

Power supply

circuit

Voltage

detection

Communications

circuit

Display

circuit

Processing

circuit

Switch

Temperature

detection

Cutoff circuit

Current-detection

resistor

Current-detection

resistor

Current-detection

resistor

Current-detection

resistor

Thermal

fuse

Thermal

fuse

Thermal

fuse

Thermal

fuse

Current-detection

resistor

Current-detection

resistor

Current-detection

resistor

Current-detection

resistor

Cutoff circuit

Current-

limiting

circuit

Cutoff circuit

Current-

limiting

circuit

Cutoff circuit

Current-

limiting

circuit

Cutoff circuit

Current-

limiting

circuit

Fuse

DC branch output 1

−V

Fuse

DC branch output 2

−V

Fuse

DC branch output 3

−V

Fuse

DC branch output 4

−V

4 Digital Multicircuit Protector S8M

Construction and Nomenclature

■Nomenclature

4 5 6 7

9 13 12

Note: The S8M-CP04-RS is shown above.

4 Tripping alarm output (TRP)

5 Alarm output (ALM)

6 Over-temperature output (TMP)

Internal circuit configuration

7 External tripping input (TRG)

No. Name Function

1 Power Input Terminals

(+V), (

2 Branch Output

3 Status Indicators

4 Tripping Alarm Output

10 11

5 Alarm Output (+,

6 Over-temperature

7 External Tripping Input

8 Seven-segment Display

9 Unit Indicators

10 Mode Key Used to change the parameter being

11 Up Key Used to move to diff erent setting

12 Down Key Used to move to different setting

13 Reset Key (RST) Used when connecting branch

14 Communications

Note: 1. For detailed display methods, refer to Status Indicators on

−V)

Terminals (+V), (

(Red, Green)

(+,

−)

Output (+,

(+,

(Red)

(Orange)

Terminals (RD, SD, SG)

2. Configured from independent circuits, and either sinking or

3. Indicators 1 to 4 will not light except when the current is

4. Press for at least 3 s to enable operation.

5. Except for the S8M-CP04.

−)

page 13.

sourcing applications are possible.

being displayed.

Connect to the input line.

Connect to the load lines.

−V)

Up to four branch outputs can be connected.

Indicate the connection and cutoff status for each branch output. Cut off: Red, Connected: Green (See note 1.)

Output (transistor: OFF) when the error tripping operation functions. (See note 2.)

−) Output (transistor: OFF) when a set

value for alarm detection is exceeded. (See note 2.)

Output (transistor: OFF) when a set value for over-temperature detection is exceeded. (See note 2.)

The tripping operation can be executed with an externally input signal.

Displays measured values and set values.

V Lit when the input voltage is being

displayed.

A Lit when the output current is being

displayed. Flashes when the peak output current is being displayed.

kh Lit when the run time is being

displayed.

°C Lit when the temperature is being

displayed. s Lit when setting the sequence time. 1 to 4 Lit or flashing when displaying branch

output information. (See note 3.)

displayed or to reset the peak hold

current value.

modes or to increase a set value.

modes or to decrease a set value.

outputs for tripping operation. (See

note 4.)

Connect to the communications lines

(RS-232C). (See note 5.)

Digital Multicircuit Protector S8M 5

Engineering Data

(A)

■Derating Curve

120

S8M-CP04, S8M-CP04-R: Maximum output current 4.0 A S8M-CP04-RS: Maximum output current 3.8 A

100

Derating Curve of the S8M

The ambient temperature that S8M can be operating is limited by the maximum output current of one branch terminal on ordinary

Maximum applied current for

any one branch output (%)

−100 10203040 6050 70−20 Ambient temperature (°C)

current condition.

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.

■Abnormal Current Tripping

Standard Detection

S8M-CP04/S8M-CP04-R S8M-CP04-RS

Time (ms)

Setting

range

Characteristics when steady

Time (ms)

Setting

range

Characteristics when steady

120.5

Current limited by internal circuit

Current

100

3.8

0.5

100

Tripping region

Instantaneous Detection

S8M-CP04/S8M-CP04-R S8M-CP04-RS

Time (ms)

Characteristics when steady

Setting

range

Current limited b internal circuit

Tripping region

120.5

Current (A)

Time (ms)

Setting

range

3.8 120.5

Tripping region

Characteristics when steady

Tripping region

Current limited by internal circuit

Current

Current limited b internal circuit

Current

6 Digital Multicircuit Protector S8M

■Mounting

Standar d Mounting

Correct

Note: 1. Improper mounting will interfere with heat dissipation and may occasionally result in deterioration or damage of internal parts.

Do not use any mounting method other than the standard one.

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.

Face-up Mounting

Incorrect

Functions

■Functions

Alarm Alarm output Output status Alarm display

Abnormal voltage tripping TRP output: OFF

(normally ON )

Abnormal current tripping TRP output: OFF

(normally ON )

Overvoltage alarm ALM output: OFF

(normally ON )

Undervoltage alarm ALM output: OFF

(normally ON )

Overcurrent alarm ALM output: OFF

(normally ON )

Run time alarm ALM output: OFF

(normally ON )

Over-temperature output TMP output: OFF

(normally ON )

All branch outputs cut off. A10

Relevant branch output cut off.

ON A20

ON A21

ON A22

ON A23

ON A30

A11

Digital Multicircuit Protector S8M 7

■Tripping Functions

Function Operation

Abnormal voltage tripping Refer to Chart 1. (See notes 2, 3 and 4.)

Abnormal current tripping Refer to Chart 2. (See notes 2 and 3.)

T ripping b y external signal (See note 2.)

Note: 1. Two abnormal current tripping types are supported depending on the tripping current characteristics: Standard detection and

instantaneous detection. Select the required tripping type.

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. (Refer to List of Alarms on page 16 for details.)

4. The voltage at the power input terminals is monitored to detect abnormal voltages. To confirm correct output voltages, measure the voltages at the branch output terminals.

The input voltage is monitored and all branch outputs are cut off if the detection voltage is reached. Notification of the status is provided using the alarm display and the tripping alarm output (TRP).

The alarm display will alternate between the voltage and the alarm code (A10). The primary voltage is measured at the input terminals.

Detection voltage: 28.8 V (fixed) The output current is monitored and the branch output that is abnormal is cut off if the preset current is reached.

Notification of the status is provided using the alarm display and the tripping alarm output (TRP). The alarm display will alternate between the current and the alarm code (A11). Abnormal current detection setting range: 0.5 to 4.0 A (S8M-CP04-RS: 0.5 to 0.38 A) in 0.1-A units. Either of two abnormal current tripping types can be set. Standard detection: Tripping within 100 ms. (If a current exceeding the set v alue flo ws for 80 ms or more, it is detected

as an abnormal current and power is cut off within 20 ms.)

Instantaneous detection: Tripping within 20 ms. (If a current exceeding the set value flows for 10 ms or more, it is

detected as an abnormal current and power is cut off within 10 ms.) (Refer to page 14 for the setting procedure.) The output can be cut off by inputting a voltage to the external tripping input (TRG terminal). If a shutdown sequence

has been set, outputs will be cut off according to the shutdown sequence. (Refer to page 14 for information on the shutdown sequence.)

External input signal width: 10 ms min. External tripping enable/disable setting: Enabled Input signal levels

High level: 19.2 to 30 VDC

Low level: 0 to 2.5 VDC Tripping can also be performed by using communications (S8M-CP04-R/RS only). Refer to the S8M User’s Manual (Cat. No. Z241) for information on tripping using communications.

Chart 1: Operation Timing Chart 2: Operation Timing

28.8 V (Abnormal voltage tripping)

25 V (Overvoltage alarm)

24 V (Rated)

18 V (Undervoltage alarm)

Alarm display

Alarm output (See note.)

Tripping alarm output (See note.)

Reset

Note: The alarm and tripping alarm output are both transistor outputs.

It is normall

100 ms 100 ms

A21 A20 A10

20 ms

3 s

ON and turns OFF when an alarm is detected.

(Fixed)

(Settable)

(Abnormal current tripping)

(Overcurrent alarm)

Tripping alarm output (See note.)

4.0 A

3.5 A

3.0 A

(Normal current)

20 ms

(Instantaneous)

Alarm display

Alarm output (See note.)

Reset

Note: The alarm and tripping alarm output are both transistor outputs.

It is normally ON and turns OFF when an alarm is detected.

100 ms

(Standard)

A22 A22 A11

Within 20 ms for instantaneous detection and 100 ms for standard detection (depends on tripping type).

3 s

(Settable)

8 Digital Multicircuit Protector S8M

+ 16 hidden pages

Omron S8M DATASHEET

Specifications and Main Features

Frequently Asked Questions

User Manual