ISS 105 Series - Five-Channel Intrinsically Safe Switch

External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The ISS-105 is a “smart” five-channel intrinsically safe relay and pump controller. The ISS-105 can be configured for a wide variety of applications including alternating or non-alternating duplex, duplex separate pump stop (SPS), triplex and quadplex applications. It can be set up for pump-up or pump-down applications or can be used as a five-channel relay.

The ISS-105 has a long list of features that are needed for multiple pump applications. The ISS-105 can indicate low, high and out-of-sequence alarms. If an out-of-sequence alarm occurs, the skipped pump(s) will be started as intended. The Model ISS-105 can be set up to do non-alternating control, alternating control and alternating control with one non-alternating pump. The non-alternating pump is intended for use with an emergency or jockey pump. The ISS-105 can start an emergency pump once every 50 cycles to keep it working freely. Using the built-in DIP switches, individual pumps can be disabled when taken out of service for repair or maintenance.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Termination TypeMounting MethodDimensionsWeight (lbs/g)Debounce Time Delay (s)HumidityInput AC Line Frequency (Hz)Input LogicInput Tolerance (%)Intrinsically Safe Circuit LocationMaximum Input PowerOutput Load Rating (VA)Protection ClassSense VoltageStockCompare
ISS-105120 VacTorque: 3.5 to 4.5 in-lbs (max. 6 in.-lbs); Wire: 12 - 20 AWG35mm DIN rail or Surface Mount (#6 or #8 screws)2.35 H x 3.7 W x 5.03 D in. (59.7 x 94.1 x 127.6 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)±10%Division 1 and 2; Class I Groups A B C D; Class II Groups E F G; Class III5Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 7 A @ 240 VacIP20 (finger safe)5 Vdc continuous (probe)Check
ISS-105-ISO120 VacTorque: 3.5 to 4.5 in-lbs (max. 6 in.-lbs); Wire: 12 - 20 AWG35mm DIN rail or Surface Mount (#6 or #8 screws)2.35 H x 3.7 W x 5.03 D in. (59.7 x 94.1 x 127.6 mm)0 Kg210 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)Input/Output Channels: 5 channels±10%Division 1 and 2; Class I Groups A B C D; Class II Groups E F G; Class III5Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 7 A @ 240 VacIP20 (finger safe)5 Vdc continuous (probe)Check
ISS-105-ISO-3120 VacTorque: 3.5 to 4.5 in-lbs (max. 6 in.-lbs); Wire: 12 - 20 AWG35mm DIN rail or Surface Mount (#6 or #8 screws)2.35 H x 3.7 W x 5.03 D in. (59.7 x 94.1 x 127.6 mm)0 Kg210 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)Input/Output Channels: 3 channels±10%Division 1 and 2; Class I Groups A B C D; Class II Groups E F G; Class III5Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 7 A @ 240 VacIP20 (finger safe)5 Vdc continuous (probe)Check
ISS-105-ISO-4120 VacTorque: 3.5 to 4.5 in-lbs (max. 6 in.-lbs); Wire: 12 - 20 AWG35mm DIN rail or Surface Mount (#6 or #8 screws)2.35 H x 3.7 W x 5.03 D in. (59.7 x 94.1 x 127.6 mm)0 Kg210 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)Input/Output Channels: 4 channels±10%Division 1 and 2; Class I Groups A B C D; Class II Groups E F G; Class III5Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 7 A @ 240 VacIP20 (finger safe)5 Vdc continuous (probe)Check
ISS-105-ISO-F120 VacTorque: 3.5 to 4.5 in-lbs (max. 6 in.-lbs); Wire: 12 - 20 AWG35mm DIN rail or Surface Mount (#6 or #8 screws)2.35 H x 3.7 W x 5.03 D in. (59.7 x 94.1 x 127.6 mm)0 Kg210 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)Input/Output Channels: 5 channels faster response time (≤75 s)±10%Division 1 and 2; Class I Groups A B C D; Class II Groups E F G; Class III5Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 7 A @ 240 VacIP20 (finger safe)5 Vdc continuous (probe)Check
To request product environmental information, please complete the Product Environmental Information Request Form.