ALT115-X-SW

Protection Relays Alternating Relays ALT SERIES 8-pin Plug-in Alternating Relay Description The ALT alternating relays are used to alternate between two loads. The ALT is commonly used in duplex pumping applications to balance the runtime of both pumps. The ALT-S is used in single high-level float applications. When the float switch opens, the alternating relay changes state, forcing the other pump to run the next time the float closes. All ALT relays have a built-in debounce feature that prevents the relay from changing state if the switch or float contact bounces momentarily. The ALT-X has an internal cross-connected relay and is used in dual high-level float applications. These floats are commonly referred to as lead and lag floats. Wiring Diagram The pumps alternate as in the ALT-S version but the crossconnected relay configuration allows both pumps to run simultaneously when both the lead and lag floats are closed. TYPICAL WIRING DIAGRAM FOR THE ALT-S These relays are also available with a built-in switch (SW option) that is used to manually force one of the pumps to run every time the float switch is closed. This is helpful when a pump has been removed for repair or for test purposes. In the case of the ALT-X-SW, the switch essentially forces one pump to be the lead pump, while still allowing the second to run when both floats are closed. Must use the OT08PC socket for UL Rating! *Note: Manufacturer’s recommended screw terminal torque for the RB Series and OT Series Octal Sockets is 12 in.-lbs. TYPICAL WIRING DIAGRAM FOR THE ALT-X (CROSS CONNECTED) ALTERNATING RELAY S1 Features & Benefits F1 1 8 S2 2 3 7 6 L1 4 F2 L2 5 F1 - F2: 1-2A TYPICAL SIZE FOR CONTACTOR COILS F3 PUMP #1 F4 MAGNETIC CONTACTORS L1 L2 F3 - F6: SIZE FOR INDIVIDUAL PUMP APPLICATION F5 PUMP #2 F6 BENEFITS Debounce time delay Prevents nuisance actuating causes by waves or spashing in the tank Built-in manual/ auto switch Force lead pump operation when a pump is removed for repair or testing (on select models) Ordering Information MODEL LINE VOLTAGE ALT024-S 20-26VAC or VDC For single high-level float applications ALT024-S-SW 20-26VAC or VDC ALT115-S 95-125VAC ALT115-S-SW 95-125VAC ALT115-X 95-125VAC ALT115-X-SW 95-125VAC ALT230-S 195-250VAC ALT230-S-SW 195-250VAC ALT230-X 195-250VAC ALT230-X-SW 195-250VAC L1 L2 Accessories OT08PC Octal 8-pin Socket 8-pin 35mm DIN rail or surface mount. Rated at 10A @ 600VAC. Surface mounted with two #6 screws or snaps onto a 35 mm DIN rail. © 2016 Littelfuse Protection Relays & Controls www.littelfuse.com/ www.littelfuse.com/alt FEATURES DESCRIPTION For single high-level float applications with built in manual switch For single high-level float applications For single high-level float applications with built in manual switch For dual high-level (lead and lag) float applications For dual high-level (lead and lag) float applications with built in manual switch For single high-level float applications For single high-level float applications with built in manual switch For dual high-level (lead and lag) float applications For dual high-level (lead and lag) float applications with built in manual switch Rev: 1-A-062116 Protection Relays Alternating Relays ALT SERIES Specifications Input Characteristics Supply Current Functional Characteristics Debounce Time Delay Control Input Impedance (min) 24 115 230 Output Characteristics Output Contact Rating 40mA 0.5 second 10kΩ 56kΩ 100kΩ 480VA @ 240VAC General Characteristics Temperature Range Maximum Input Power Safety Marks UL (OT08PC octal socket required) CSA Dimensions (with socket) Weight Mounting Method Socket Available -40° to 50°C (-40° to 122°F) 5W UL508 (File #E68520) C22.2 No. 14 (File #46510) H 44.45 mm (1.75”); W 60.33 mm (2.375”); D 104.78 mm (4.125”) 0.38 lb. (6.08 oz., 172.67 g) DIN rail or surface mount (plug into OT08PC socket) OT08PC (UL Rating 600V) The 600V socket can be surface mounted or installed on DIN Rail. © 2016 Littelfuse Protection Relays & Controls www.littelfuse.com/ www.littelfuse.com/alt Rev: 1-A-062116