G2LM20 Level monitoring of conductive liquids Monitoring relays - GAMMA series Multifunction Secure isolation of the measuring circuit 2 change-over contacts Width 22.5mm Industrial design Technical data 1. Functions Fusing: 5A fast acting 6 Level monitoring of conductive liquid, timing for tripping delay and turn-off Mechanical life: 20 x 10 Operations 5 delay separately adjustable and the following functions (selectable by Electrical life: 2 x 10 Operations at 1000VA resistive load means of rotary switch) Switching frequency: max. 60/min at 100VA resistive load Pump up pump up or minimum monitoring max. 6/min at 1000VA resistive load Pump down pump down or maximum monitoring (in accordance with IEC 60947-5-1) Overvoltage category: III (in accordance with IEC 60664-1) 2. Time ranges Rated surge voltage: 4kV Adjustment range Tripping delay (Delay ON): 0.5s 10s 7. Measuring circuit Turn-off delay (Delay OFF): 0.5s 10s Input: conductive probes (type SK1, SK2, SK3) terminals E1-E2-E3 3. Indicators Sensitivity: 0.25 to 100k (4mS to 10S) Green LED ON: indication of supply voltage Sensor voltage: 12V AC Yellow LED ON/OFF: indication of relay output Sensor current: max. 7mA Wiring distance (capacity of cable 100nF/km): 4. Mechanical design max. 1000m (set value <50%) Self-extinguishing plastic housing, IP rating IP40 max. 100m (set value 100%) Mounted on DIN-Rail TS 35 according to EN 60715 Overvoltage category: III (in accordance with IEC 60664-1) Mounting position: any Rated surge voltage: 6kV Shockproof terminal connection according to VBG 4 (PZ1 required), IP rating IP20 8. Accuracy Tightening torque: max. 1Nm Base accuracy: - Terminal capacity: Adjustment accuracy: - 1 x 0.5 to 2.5mm with/without multicore cable end Repetition accuracy: - 1 x 4mm without multicore cable end Voltage influence: - 2 x 0.5 to 1.5mm with/without multicore cable end Temperature influence: - 2 x 2.5mm flexible without multicore cable end 9. Ambient conditions 5. Input circuit Ambient temperature: -25 to +55C (in accordance with IEC 60068-1) Supply voltage: -25 to +40C (in accordance with UL 508) 24V AC terminals A1-A2 (G2LM20 24VAC) Storage temperature: -25 to +70C 110V AC terminals A1-A2 (G2LM20 110VAC) Transport temperature: -25 to +70C 230V AC terminals A1-A2 (G2LM20 230VAC) Relative humidity: 15% to 85% Tolerance: (in accordance with IEC 60721-3-3 class 3K3) 24V AC -15% to +10% (G2LM20 24VAC) Pollution degree: 3 (in accordance with IEC 60664-1) 110V AC -15% to +10% (G2LM20 110VAC) Vibration resistance: 10 to 55Hz 0.35mm 230V AC -15% to +15% (G2LM20 230VAC) (in accordance with IEC 60068-2-6) Rated frequency: 48 to 63Hz Shock resistance: 15g 11ms Rated consumption: (in accordance with IEC 60068-2-27) 24V AC 2VA (1.5W) (G2LM20 24VAC) 110V AC 2VA (1.5W) (G2LM20 110VAC) 230V AC 2VA (1.5W) (G2LM20 230VAC) Duration of operation: 100% Reset time: 500ms Residual ripple for DC: - Drop-out voltage: >30% of the supply voltage Overvoltage category: III (in accordance with IEC 60664-1) Rated surge voltage: 4kV 6. Output circuit 2 potential free change-over contacts Rated voltage: 250V AC Switching capacity: 750VA (3A / 250V) If the distance between the devices is less than 5mm Switching capacity: 1250VA (5A / 250V) If the distance between the devices is greater than 5mm www.tele-online.comG2LM20 Maximum monitoring (Pump down) Functions Connection of probe rods E2 and E3 (Bridge E1-E3). Alternatively the electrically conducting container can be connected in lieu of the test Pump up probe E3. Connection of the probe rods E1, E2 and E3. Alternatively the electrically When the probe E2 gets moistened the set interval of the tripping delay conducting container can be connected in lieu of the test probe E3. (DELAY ON) begins. After the expiration of the interval the output relays When the air-fluid level falls below the minimum probe E2 the set interval switch into on-position (yellow LED illuminated). When the air-fluid level of the tripping delay (DELAY ON) begins. After the expiration of the sinks below the probe E2, the set interval of the turn-off delay (DELAY interval the output relays switch into on-position (yellow LED illuminated). OFF) begins. After the expiration of the interval the output relays switch When the air-fluid level again rises above the maximum probe E1, the into off-position (yellow LED not illuminated). set interval of the turn-off delay (DELAY OFF) begins. After the expiration of the interval the output relays switch into off-position (yellow LED not U illuminated). U Note Minimum monitoring (Pump up) Use cables with low capacity for wiring the probes especially with Connection of probe rods E2 and E3 (Bridge E1-E3). Alternatively the extended wiring length. electrically conducting container can be connected in lieu of the test probe E3. Following processes are suggested for the adjustment: When the air-fluid level falls below the probe E2 the set interval of the tripping delay (DELAY ON) begins. After the expiration of the interval - The existent time delay should be to minimum (0,5s). the output relays switch into on-position (yellow LED illuminated). When the air-fluid level again rises above the probe E2, the set interval of the - The function selector switch must be in position pump down. turn-off delay (DELAY OFF) begins. After the expiration of the interval the output relays switch into off-position (yellow LED not illuminated). - Turn the sensitivity controller slowly clockwise from min to max until the relais switch into on-position. (probes must be in dipped state) U - The moistened probes should be taken out of the liquid to control if the relais switch into off-position. If the relais doesnt switch into off-position, turn the sensitivity controller slightly back to min. (coun ter clockwise) - Set the existent time delay to desired value to fade out a short term moisten the probes by waves in the liquid. - Set the function selector switch to desired position. (either pump up Pump down or pump down) Connection of the probe rods E1, E2 and E3. Alternatively the electrically conducting container can be connected in lieu of the test probe E3. When the maximum probe E1 gets moistened the set interval of the tripping delay (DELAY ON) begins. After the expiration of the interval the output relays switch into on-position (yellow LED illuminated). When the air-fluid level falls below the minimum probe E2, the set interval of the turn-off delay (DELAY OFF) begins. After the expiration of the interval the output relays switch into off-position (yellow LED not illuminated). U www.tele-online.com