User manual OMRON S8M

[. . . ] 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- 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. [. . . ] Time setting range: 0. 0 to 99. 9 s Repeated for each branch output. Note: 1. Parameters cannot be changed in protection level 2. The S8M will start in Setting Mode when power is turned ON for the first time after shipping from the factory. Refer to the S8M User's Manual (Cat. Not displayed in protection level 1 or 2. Not displayed in protection level 2. Clearing the Run Time The run time can be cleared. Select the run time to be cleared in Run Mode and then use the following operation. Clearing the Run Time Waiting display, 1 s Setting Parameters Parameters are set as shown below. Example for Setting the Abnormal Current Tripping Value Use to change the set value. 1 2 3 4 V A kh °C s or 3 s with no key operations 1 2 3 4 V A kh °C s 1 2 3 4 V A kh °C s After no key operations for 3s 1 2 3 4 V A kh °C s After flashing for 3 s When finished, press to save the set value. After flashing for 3 s 1 2 3 4 V A kh °C s Set value saved (flashes for 3 s) Note: Indicator Status Notation : Lit : Flashing 1 2 3 4 V A kh °C s 1 2 3 4 V A kh °C s 14 Digital Multicircuit Protector S8M Test Mode Device startup operation can be tested by turning ON/OFF branch outputs either individually or together. The branch outputs that are to be used are set to be connected in Test Mode. The operation to turn all branch outputs ON/OFF together can be used to check startup and shutdown sequences. Turning ON/OFF Individual Branch Outputs The following display will appear when Test Mode is entered and the Up and Down Keys ( and ) can be used to select the branch output. Set the branch output number to be output, confirming the number on the mode indicators, and then turn ON the output. The ON/OFF (connected/cut off) status of the branch outputs can be confirmed on the status indicators. An indicator will light green if the output is connected normally. Waiting for connection (branch output 1 is OFF) Protection Level Setting A protection level can be set to prevent operating errors during normal operation. Reading or changing parameter settings and other operations can be restricted in three levels. Protection Level 0 1 2 Intended for Facility designers and manufacturers Possible operations All settings can be read and changed. Facility maintenance Some settings can be read and personnel changed. On-site operators Settings can be read but not changed. Select PRT (protection level) from the Mode Selection Menu and then perform the following procedure. (The following example shows changing to protection level 0. ) Setting Protection Level Waiting display, 1 s (operation executed) 1 2 3 4 V A kh °C s Changes after the Waiting for cutoff (branch output 1 is ON) waiting display. 1 A kh °C s 2 3 4 V A kh °C s Mode Selection Menu (Protection Level) Run Mode After no key operations for 3s Set value saved (flashes for 3 s) 1 2 3 4 V 2. Turn ON/OFF All Branch Outputs The Up and Down Keys ( and ) can also be used to select all branch output numbers. Use the Mode Key to execute the operation. The all branch outputs will be connected if the Mode Key ( ) is pressed in this status. Confirm that the status indicators for all branch outputs light green. 1 2 3 4 V A kh °C s Parameter Initialization All S8M parameters can be restored to their default settings. [. . . ] Either change the abnormal current tripping type from instantaneous to standard or raise the current tripping value. Use the S8M's startup sequence function to spread out the connections to the devices (delay the connection of some devices). To protect the S8M's internal circuits, at If "RST" is displayed when the Reset Key is pressed for at least 3 s, the cutleast 15 seconds must pass before a off output can be reset when 15 s has cut-off output can be reset. The original cause of tripping may not have been eliminated. After resetting the error, a large current may have flowed again. Eliminate the cause of the cutoff and press the Reset Key for at least 3 s. The output was reset, but it was immediately cut off again. Maintenance The run time alarm went OFF, so the equipment was checked and other parts were replaced, but the alarm could not be cleared. The S8M continues adding to the run Clear the run time. [. . . ]