255 Series - Industrial Latching Relays 3PDT or 4PST, 10 Amp 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. File No. E13224 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) Contacts: Contact Conguration Up to 3PDT or 4PST Silver Alloy Gold Diffused Contact Material Contact Rating 120 / 240VAC Resistive 10 Amp / 5 Amp 28VDC Resistive 10 Amp Contact Resistance, Initial 100 milliohms max 6VDC Coil: Coils Available AC and DC Nominal Coil Power 5VA 1.8W Input Voltage Tolerance - AC 85% to 110% of nominal 80% to 110% of nominal Input Voltage Tolerance - DC Drop out voltage 10% of nominal Duty Continuous 255 Wire Diagram (Top View) Timing: 25mS Operate Time (max) Release Time (max) 20mS 6 5 4 3 2 1 Dielectric Strength: Across Open Contacts 1500Vrms 1500Vrms Between Mutally Insulated Points 7 89 10 11 12 Insulation Resistance 1000 Megohms min 500VDC 255XBX (DPDT) Temperature: Operating -20 to 60C (-4 to 140F) -40 to 105C (-40 to 221F) Storage 6 5 4 3 2 1 Life Expectancy: Electrical (full load operations) 100,000 Mechanical (no load operations) 10,000,000 7 8 9 10 11 12 Miscellaneous: Mounting Position Any 255ABX (1 N.O + DPDT) Mating Socket 27390D Enclosure Clear Polycarbonate 11.8oz (300 grams) Weight Reset 6 5 4 3 2 1 6 5 4 3 2 1 7 89 10 11 12 7 89 10 11 12 255BXB (2 N.O. + 2 N.C.) 255XCX (3PDT) 4/7 wwwwww..struthers-dunn.comstruthers-dunn.com (843) 346-4427 (843) 346-4427 Operate Operate Operate Reset Reset Operate ResetLatching / Sequencing Relays 10 - 100 Amp 255 Contact Load Specications Outline Dimensions Dimensions Shown in inches & (millimeters) 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 3.72 For versions with sufx 69 permanent magnet blowouts (94.4) Voltage Resistive Inductive 125VDC (SM) 1.5 Amp 0.5 Amp 125VDC (DM) 4 Amp 1.5 Amp 4.52 250VDC (SM) 0.5 Amp 150 mAmp (114.8) 250VDC (DM) 1.5 Amp 0.5 Amp Note: SM = Single make DM = Double make Coil Specications *AC Coil, 50/60HZ Optional manual Reset coil (3VA) Operate Coil (5VA) actuator Nominal Resistance Coil Current Resistance Coil Current voltage ohms (mA) ohms (mA) 10% 10% 1.44 6 6 1000 1.10 5454 (36.7) 12 21 571 4.20 2857 616 545 4 33 22 1 24 85 282 15.5 527 120 2250 53 540 222 240 9110 26 2150 112 2.63 (66.8) Current inrush on all AC coils is less than twice the listed milliam- peres ratings as shown in the AC coil data table. *Currents shown in table measured at 60Hz Ordering Code 255 XCX P LM- DC Coil Series Reset coil (1.4W) Operate Coil (1.8W) 255 Nominal Resistance Coil Current Resistance Coil Current voltage ohms (mA) ohms (mA) Contact Arrangement 10% 10% XBX (DPDT) - (2 form C) 6 32.1 187 15.5 385 XCX (3PDT) - (3 form C) 12 120 100 63.5 189 ABX (DPDT & 1 N.O. contact) 24 360 67 250 96.0 BXB (DPST - N.O. & DPST - N.C.) 48 1800 26.7 975 49.2 115/125 8000 14.4 6200 20.0 Standard Features 250 24,600 10.2 27,777 9.0 Polycarbonate cover - CODE P DC relays, 1.8 Watts (2.5 Watts 125VDC) 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) 4/8 wwwwww..struthers-dunn.comstruthers-dunn.com (843) 346-4427 (843) 346-4427 Section 4Section 4 1212 1111 1100 99 88 77