255 Series - Industrial Latching Relays 3PDT or 4PST, 10 Amp File No. E13224 The 255 Series is a two coil latching version of the general purpose type 219 relay. When the operate coil is momentarily energized, contacts transfer and remain so even after coil power is removed. The second coil when momentarily energized, provides electrical reset of the contacts. There is an optional manual reset actuator. All contacts operate from a common armature to prevent contact overlapping. Coils are rated for continuous duty. Both coils can be energized at the same time with no damage. The operate coil is dominant. GENERAL SPECIFICATIONS (@ 25 C) AC and DC 5VA 1.8W 85% to 110% of nominal 80% to 110% of nominal 10% of nominal Continuous 255 Wire Diagram (Top View) 25mS 20mS 6 Dielectric Strength: 1500Vrms Across Open Contacts 1500Vrms Between Mutally Insulated Points 1000 Megohms min @ 500VDC Insulation Resistance Miscellaneous: Mounting Position Mating Socket Enclosure Weight 4 3 2 1 8 9 10 11 12 255XBX (DPDT) -20 to 60C (-4 to 140F) -40 to 105C (-40 to 221F) 6 100,000 10,000,000 7 Any 27390D Clear Polycarbonate 11.8oz (300 grams) 5 4 3 2 1 8 9 10 11 12 255ABX (1 N.O + DPDT) Reset 5 4 3 2 1 8 9 10 11 12 6 Operate Operate 6 7 7 255XCX (3PDT) 4/7 www.struthers-dunn.com 5 4 3 2 1 8 9 10 11 12 Reset Life Expectancy: Electrical (full load operations) Mechanical (no load operations) 7 Operate Temperature: Operating Storage 5 Reset Timing: Operate Time (max) Release Time (max) 10 Amp / 5 Amp 10 Amp 100 milliohms max @ 6VDC Reset Coil: Coils Available Nominal Coil Power Input Voltage Tolerance - AC Input Voltage Tolerance - DC Drop out voltage Duty Up to 3PDT or 4PST Silver Alloy Gold Diffused Operate Contacts: Contact Configuration Contact Material Contact Rating 120 / 240VAC Resistive 28VDC Resistive Contact Resistance, Initial 255BXB (2 N.O. + 2 N.C.) (843) 346-4427 Latching / Sequencing Relays 10 - 100 Amp 255 Contact Load Specifications Outline Dimensions Load Voltage Resistive Inductive 120VAC 10 Amp 3 Amp 240VAC 5 Amp 1 Amp 24VDC 10 Amp 3 Amp 28VDC 10 Amp 3 Amp 125VDC 0.5 Amp 0.1 Amp For versions with suffix "69" permanent magnet blowouts Voltage Resistive Inductive 125VDC (SM) 1.5 Amp 0.5 Amp 125VDC (DM) 4 Amp 1.5 Amp 250VDC (SM) 0.5 Amp 150 mAmp 250VDC (DM) 1.5 Amp 0.5 Amp Note: SM = Single make DM = Double make Section 4 Dimensions Shown in inches & (millimeters) 3.72 (94.4) 4.52 (114.8) Coil Specifications 7 8 9 10 11 DC Coil Reset coil (1.4W) Operate Coil (1.8W) Nominal Resistance Coil Current Resistance Coil Current voltage ohms (mA) ohms (mA) 10% 10% 6 32.1 187 15.5 385 12 120 100 63.5 189 24 360 67 250 96.0 48 1800 26.7 975 49.2 115/125 8000 14.4 6200 20.0 250 24,600 10.2 27,777 9.0 DC relays, 1.8 Watts (2.5 Watts @ 125VDC) Optional manual actuator 12 *AC Coil, 50/60HZ Reset coil (3VA) Operate Coil (5VA) Nominal Resistance Coil Current Resistance Coil Current voltage ohms (mA) ohms (mA) 10% 10% 6 6 1000 1.10 5454 12 21 571 4.20 2857 24 85 282 15.5 527 120 2250 53 540 222 240 9110 26 2150 112 Current inrush on all AC coils is less than twice the listed milliamperes ratings as shown in the AC coil data table. *Currents shown in table measured at 60Hz 6 5 4 3 2 1 1.44 (36.7) 2.63 (66.8) Ordering Code 255 XCX P LM- Series 255 Contact Arrangement XBX (DPDT) - (2 form C) XCX (3PDT) - (3 form C) ABX (DPDT & 1 N.O. contact) BXB (DPST - N.O. & DPST - N.C.) Standard Features Polycarbonate cover - CODE P Optional Features Permanent magnet blowout - CODE 69 Indicator lamp across both coils - CODE L Manual actuator - CODE M Bifurcated contacts - CODE 33 Coil Voltage AC: 6, 12, 24, 120, 240 (Add VAC) DC: 6, 12, 24, 48, 115-125, 250 (Add VDC) www.struthers-dunn.com (843) 346-4427 4/8