omRon Temperature Monitoring RelayK8AK-TH Compact and Slim Relay Ideal for Temperature Alarms and Monitoring • Excessive temperature increases can be prevented and abnormal temperatures can be monitored. • Temperature monitoring in slim design with a width of just 22.5 mm. • Rotary switches simplifies temperature settings. • Universal-input support for thermocouple or platinum resistance thermometer sensor input. • Change the output relay between normally open and normally closed operation. •Alarm status identification with LED indicator. • Self-holding output. • Alarm output status can be retained even if the power supply is turned OFF. A Refer to Safety Precautions on page 8. Ordering InformationK8AK-TH (Temperature Input Models) Power supply voltage * Refer to Setting Ranges on page 3 for the setting ranges. Note: When ordering, designate the power supply specification. Different Relay models are used for 100 to 240 VAC and 24 VAC/VDC.

K8AK-TH11S K8AK-TH12S *1 The input power supply depends on the model: 100 to 240 VAC or 24 VAC/VDC (no polarity) *2 Wiring of the external input terminals is as shown below. Timing Charts ■ Temperat ure Alarm: Hysteresis: 2° Temperat ure setting Temperature alarm upper limit (11) to (14) Temperature alarm lower limit (11) to (14) ■ Changing between Normally Open and Normally Closed Power supply Temperat ure alarm or other error Relay output (normally open) (11) to (14) Relay output (normally closed) (11) to (14) * Other errors: sensor open circuit error, sensor input error, temperature setting...

Nomenclature Front Operations ●Error (ALM indicator: Flashing) Power supply Relay output Temperature unit (Black out the unnecessary label: °C or °F) ALM indicator (Red) R_SW1 LATCH_RST button* External input (LATCH_RST) Sensor input One of the following items 1 to 3 has occurred. 1. The sensor circuit is disconnected or the temperature setting is out of the specified range. 2. The temperature setting is out of the specified range. 3. There is a problem in the internal circuits. Corrections 1. Disable SV Protect Mode. 2. Disable the latch. 3. Check for incorrect wiring, circuit disconnections,...

Function Selection DIP Switch 0 Settings K8AK-TH11S * Default settings: All OFF Turn OFF the power to the Temperature Monitoring Relay before you change the switch settings on the side panel. The switch settings made on the side panel take effect when the power is turned ON. Use a precision screwdriver to manipulate the switches and button. Upper limit alarm Lower limit alarm With latching Without latching Q Normally open Safety standards

K8AK-TH Functions ●SV Protection This function protects (i.e., prohibits changing) the alarm setting, operating method, and modes for the Temperature Monitoring Relay that have been set on the rotary switches and DIP switch. The protection function is activated by pressing the output latch reset button on the Temperature Monitoring Relay for at least 5 s or by turning ON the input to the external input terminal for at least 5 s. The power indicator will flash when the protection is activated. The protection function can be released by pressing the output latch reset button on the Temperature...

Warning Indications K8AK-TH Safety Precautions Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/. Electrical shock may cause minor injury. Do not touch terminals while electricity is being supplied. There is a risk of minor electrical shock, fire, or device failure. Do not allow any pieces of metal, conductors, or cutting chips that occur during the installation process to enter the product. Explosions may cause minor injuries. Do not use the product in locations with inflammable or explosive gases. There is a risk of minor electrical...

Precautions for Safe Use 1. Do not use or store the product in the following locations. • Locations subject to water or oil • Locations subject to direct radiant heat from heating equipment • Outdoor locations or under direct sunlight • Locations subject to dust or corrosive gases (particularly sulfurizing gases, ammonia, etc.) • Locations subject to rapid temperature changes • Locations prone to icing and dew condensation • Locations subject to excessive vibration or shock 2. Use and store the product in a location where the ambient temperature and humidity are within the specified ranges. If...

Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR...

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