Current and Voltage Controls 1-Phase Max. and Min. Voltage Control Type S 177 * AC monitoring relay for upper and lower voltage control * Measures on own AC power supply * Measuring range: 20 - 260 VAC * Upper and lower limits separately adjustable * Built-in adjustable timer function * Output: 10 A SPDT relay * Plug-in type module * S-housing * LED-indication for power supply and output ON Product Description Ordering Key 1-phase knob-adjustable upper and lower voltage plug-in monitoring relay. Built-in time delay function prevents reaction to sudden voltage peaks. Housing Type Output Power supply Often used in applications where the mains has to be controlled within a set voltage range. S 177 156 220 Type Selection Plug Output Supply: 24 VAC Supply: 120 VAC Supply: 220 VAC Circular SPDT S 177 156 024 S 177 156 120 S 177 156 220 Input Specifications Output Specifications Input Through pins 2 & 10 Measuring ranges Type Supply voltage Output Rated insulation voltage Range Lower Upper (VAC) limit limit 20- 28 20-23.5 24.5-28 100-140 100-118 122-140 180-260 180-217 223-260 measuring range equals rms-value of a sinusoidal voltage, measures on own supply Contact ratings (AgCdO) Resistive loads AC 1 DC 1 or Small inductive loads AC 15 DC 13 Mechanical life Electrical life AC 1 S .77 024 S .77 120 S .77 220 Supply Specifications Power supply AC types Rated operational voltage Through pins 2 & 10 024 120 220 Voltage interruption Dielectric voltage Rated impulse withstand volt. Rated operational power Overvoltage cat. III (IEC 60664) (IEC 60038) 20- 28 VAC, 45 to 65 Hz 100-140 VAC, 45 to 65 Hz 180-260 VAC, 45 to 65 Hz 40 ms None (supply/elect.) 4 kV (1.2/50 s) (line/neutral), direct connection to elect. 5 VA Specifications are subject to change without notice SPDT relay 250 VAC (rms) (cont./elect.) (micro gap) 10 A/250 VAC (2500 VA) 1 A/250 VDC (250 W) 10 A/25 VDC (250 W) 2.5 A/230 VAC 5 A/24 VDC 30 x 106 operations 2.5 x 105 operations (at max. load) 7200 operations/h Operating frequency Dielectric strength Dielectric voltage 2 kVAC (rms) (cont./elect.) Rated impulse withstand volt. 4 kV (1.2/50 s) (cont./elect.) (IEC 60664) 1 S 177 General Specifications Mode of Operation Power ON delay (td) Reaction time 6s2s = 1.2 s, worst case reaction time may be up to 5 x Adjustable delay on release built-in (0.15s - 10s) S 177 measures the average of its own sinusoidal power supply. The two set points, calibrated to rms-value, are set on upper or middle potentiometer. 10s, -1/+3 s on max. < 0.1 s on min. The relay operates as long as the value of the measured power supply lies within the Accuracy OFF delay Indication for Power supply ON Output ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Approvals LED, green LED, red (IEC 60947-1) IP 20 B (IEC 60529) 2 (IEC 60664) -20 to +50C (-4 to +122F) -50 to +85C (-58 to +185F) 200 g UL, CSA separately adjustable upper and lower limits. The relay releases with an adjustable time delay of 0.15 to 10 s when the value of the measured power supply is above the upper limit or below the lower limit. Time/Range Setting Range setting Upper potentiometer: Setting of upper limit on absolute scale in volts. Middle potentiometer: Setting of lower limit on absolute scale in volts. Time setting Bottom potentiometer: Setting of time on relative scale. Time Delay on release, adjustable 0.15 to 10 s. However, the delay on release will never be of shorter duration than the reaction time. Hysteresis Hysteresis in relation to measuring voltage is approx. - 2% for upper limit and approx. + 2% for lower limit. Operation Diagram td = Power-ON delay t = Time (delay on release) Upper limit Hysteresis Lower limit Hysteresis Relay ON Wiring Diagram Accessories Sockets Hold down spring Mounting rack Socket covers Front mounting bezel Potentiometer lock S 411 HF SM 13 BB 4 FRS 2 PL 2 For further information refer to "Accessories". (+) (-) Power supply S 177 156 2 Specifications are subject to change without notice