Long-distance Separate-amplifier Series Features Detecting distance twice that of conventional sensors Detecting distance easily adjustable Wide range of sensor head types available Built-in alarm output Detecting Distance Shielded Up to 8 mm (.") Non-shielded Up to 7 mm (.7") Description Long-detecting distance A separate amplifier gives the Series twice the detecting distance of self-contained proximity sensors. Detecting distance can be easily adjusted The Series doesn t need precise adjustments to sensor position during setup. You can adjust the detecting distance using the adjustment trimmer after the sensor head is installed or during operation, when necessary. Because of its small hysteresis, the Series can detect minute height differences of continuously moving objects. Dust cover (-X8) The -X8 is equipped with a dust cover to protect the amplifier. The hinged cover remains on the amplifier when opened or closed. ON Small difference 7 models of sensor heads available s are available in sizes ranging from.8 mm to 9. mm." to." in diameter. Protected cable (EH-S/8S/S) The sensor cable is encased in a stainless steel spiral tube to prevent breakage. Compact size (EH-) The smallest Series proximity sensor, with a sensor head.8 mm." in diameter, offers the maximum detecting distance of 7 mm.8". Space-saving (EH-A) The Series thin-type sensor is only.8 mm.9" thick, enabling it to be installed in areas of limited space. Resistant to welding spatter (optional) The Teflon cap protects the sensor head (EH-8//) from welding spatters. Refer to P.9 for a list of products complying with C directive. Oil-resistant (EH-8) Precision-machined stainless steel and a special sealing mechanism makes the EH-8 highly resistant to oil. For More Info & Data www.keyence.com/askg
Long-distance Separate-amplifier Applications Detection of E-ring insertion Selection Chart Shielded Type, with spiral tube, with spiral tube Threaded, oil-resistant Threaded Threaded, with spiral tube.8 mm dia..".8 mm dia..". mm dia..". mm dia.." 8 mm dia.." 8 mm dia.." M8 M M Checking of part ID affixed to pallet Determination of transistor placement Size Shape Detecting distance Model. mm." (. mm)." mm.8" (.8 mm)." mm." ( mm)." mm." ( mm)." ( mm).8" ( mm).8" ( mm).8" mm mm. mm." (. mm)." ( mm).8" mm mm."."."." Confirmation of seating of piston to be drilled EH- EH-A EH- EH-S EH-8 EH-8S EH-8 EH- EH-S Threaded Thin M t=.8 mm.9" ( mm)." ( mm)." 8 mm 8 mm."." EH- EH-A.8 mm dia.." ( mm)." 7 mm.8" EH-. mm dia..7" ( mm)." mm." EH- Non-shielded, Threaded mm dia..87" mm dia..8" 8 mm.7" (9 mm)." mm.98" ( mm).7" EH- EH- mm dia..7" mm." (8 mm).7" EH- 9 mm dia.." ( mm).8" 7 mm.7" EH-9 Stable detecting distance Maximum detecting distance
Long-distance Separate-amplifier Amplifier Shape Power supply Output Output mode Model KEYENCE - AC. This product does not comply with the C directive. Specifications Type. Not designed for immersed use. to 8 VDC 8 to VAC to VDC 8 to VAC Model EH- Stable detecting range Maximum detecting distance Detectable object NPN ma ( V) max. Thyristor output VAC, to ma NPN ma ( V) max. Thyristor output VAC, to ma Shielded N.O./ N.C. selectable N.O./ N.C. selectable N.O./ N.C. selectable N.O. N.C. -DC -AC. -X8 -AC. -AC. Threaded EH-A EH- EH-8 EH- to. mm." to.8 mm." to mm." to mm.8". mm." mm.8" mm." mm." Ferrous metals (see Characteristics for nonferrous metals) S tandard target (iron, t= mm.") x mm." x mm.9" Repeatability Hysteresis Temperature fluctuation. mm.8". mm.". mm.". mm.". mm." ± % max. (EH-: - to +%) of detecting distance at + C (7. F), w ithin - to + C ( to F) Enclosure rating IP-7 Ambient temperature - to + C ( to F), No freezing Relative humidity Weight ( including nuts and -m 9.8' cable) Type 9 g Threaded Model EH- Stable detecting range Maximum detecting distance Detectable object 8 g Shielded Thin to 8%, No condensation g Oil-resistant EH-A H-8. E to mm." to. mm." 8 mm.". mm." Ferrous metals (see Characteristics for nonferrous metals) S tandard target (iron, t= mm.") x mm.9" x mm.9" Repeatability Hysteresis Temperature fluctuation. mm.". mm.".7 mm." ± % max. of detecting distance at + C (7. F), w ithin - to + C ( to F) Enclosure rating IP-7 Ambient temperature - to + C ( to F), No freezing Relative humidity Weight ( including nuts and -m 9.8' cable) g to 8%, No condensation 7 g g 7 g g
Long-distance Separate-amplifier Type Model Stable detecting range Maximum detecting distance Detectable object Amplifier. This product does not comply with the C directive. EH-S Shielded; Spiral tube EH-8S Threaded EH-S H- Non-shielded and threaded EH- E to mm." to mm.8" to mm." to mm." mm." mm." 7 mm.8" mm." Ferrous metals (see Characteristics for nonferrous metals) S tandard target (iron, t= mm.") x mm." x mm.9" x mm.79" Repeatability Hysteresis emperature fluctuation nclosure rating mbient temperature Relative humidity Weight ( including nuts and -m 9.8' cable). mm.8". mm.". mm.". mm.8". mm.". mm.". mm." T ± % max. (EH-: +%, -% max.) of detecting distance at + C (7. F ), within - to + C ( to F) E IP-7 A - to + C ( to F), No freezing Type 7 g 88 g to 8%, No condensation Non-shielded and threaded g 8 g Model EH- EH- EH- EH-9 Stable detecting range Maximum detecting distance Detectable object S tandard target (iron, t= mm " Repeatability Hysteresis Temperature fluctuation to 9 mm." to mm.7" to 8 mm.7" to mm.8" 8 mm.7" mm.98" mm." 7 mm.7" Ferrous metals (see Characteristics for nonferrous metals). ) x mm.98" x mm.8" x mm.7" x mm.9". mm.8". mm.".7 mm.".7 mm.". mm.".8 mm.". mm.". mm.8" ±% max. (EH-: +%, -% max.) of detecting distance a t + C (7. F ), within - to + C ( to F) Enclosure rating IP-7 Ambient temperature - to + C ( to F), No freezing Relative humidity Weight ( including nuts and -m 9.8' cable) Type Model Power supply 7 g DC to 8%, No condensation g -DC -X8 to 8 VDC to VDC 8 g. E S-AC 8 to VAC / Hz g AC 7 g.. E S-AC E S-AC 8 to VAC / Hz 8 to VAC / Hz C urrent/power consumption 8 ma max. ma max.. VA max. VA max. VA max. R esponse time ms max. ms max. Temperature fluctuation ± 8% of detecting distance at + C (7. F ), within to + C ( to F) Sensitivity adjustment -turn trimmer O peration mode N.O./N.C. (switch-selectable) N.O. N.C. Indicator Control output Disconnection alarm output NPN: ma ( V) max. Residual voltage: V max. NPN: ma ( V) max. Residual voltage: V max. NPN: ma ( V) max. Residual voltage: V max. Output: Red L Thyristor VAC, to ma L eakage current (OFF time). ma max. Ambient temperature to + C ( to F), No freezing Relative humidity Weight 8 g 7g ( including -m.' cable) to 8%, No condensation 8 g Thyristor VAC, to ma g
Long-distance Separate-amplifier Connections -DC -AC Shield (Alarm output) (Control output) Shield 8 to VAC to 8 VDC to VAC Output Circuits NPN -DC Main circuit (Control output) (Alarm output) to 8 VDC NPN -X8 Main circuit -X8 Shield -AC/-AC 8 to VAC Shield to VAC Brown Blue Black (Control output) Orange (Alarm output) Brown Black Orange Blue to VDC to VDC THYRISTOR -AC/AC/AC Main circuit Photocouplar isolation AC AC Adjustment Both NEAR-ON and NEAR-OFF modes are available NEAR-ON mode uses a normally open relay that closes when the target is detected. NEAR-OFF mode uses a normally closed relay that opens when the target is detected. NEAR-ON operation (-DC/AC/AC) NEAR-OFF operation (-DC/AC/AC) Lights when target is in place A Indicator turns off Trimmer Optimal position Detecting range B Lights when there is no target. With the target in place, turn the trimmer clockwise and find point A at which the output indicator lights. (If the output indicator is already lit, turn the trimmer counterclockwise.). With the target removed, again turn the trimmer clockwise and find point B at which the output indicator lights. Turns off when target is in place A Indicator lights Trimmer Optimal position Detecting range B Turns off when there is no target. With the target in place, turn the trimmer clockwise and find point A at which the output indicator turns off. (If the output indicator is already off, turn the trimmer counterclockwise.). With the target removed, again turn the trimmer clockwise and find point B at which the output indicator turns off.. Set the trimmer midway between points A and B. The output circuit will now actuate when the output indicator lights.. Set the trimmer midway between points A and B. The output circuit will now actuate when the output indicator lights.
Long-distance Separate-amplifier Operation mode selector switch Use a screwdriver to set the position of the operation mode selector switch, located in the lower part of the controller, to the desired operation mode. (-DC/AC) A: NEAR-ON operation mode (N.O.) A B B: NEAR-OFF operation mode (N.C.) -X8: Set the operation mode selector switch provided on the panel. Output indicator NEAR-ON (N.O.) Sensitivity adjustment NEAR-OFF (N.C.) trimmer OUT SENS MODE -X8 N.O N.C Operation mode selector switch Characteristics Detecting range (Typical) % of rated detecting distance % of rated detecting distance Detecting distance Y X Distance X Standard Target Y Sensor EH-.7.... %."."." EH-A.8. % %."..". %.".".".".8" EH-/S..7.. These graphs show variations in detecting distance measured by moving the target parallel to the sensor head for a distance % and % of the stable detecting distance.." %."." %."." -. - -.. X (mm) - - X (mm) -." -." -."."."." -.8" -.".".8" EH-8/8S EH-/S.."..".. % %.8".8"." %.".".." %.".." - - X (mm) -.8" -.".".8" - - - - X (mm) - - -." -.8".8"." -." -.8".8"." X (mm) EH- EH-A EH-."." %." % %." %.8".".".".".8"."....." %.".".8" %."."." -8 - - - 8 X (mm) -8 - - - 8 X (mm) - - -." -."."." -." -."."." -.8" -.".".8" X (mm)
Long-distance Separate-amplifier EH- EH- EH- 7.8" % 9.".". % 7.8"."."." %." % 7..".".".8".8".."." - - X (mm) - - X (mm) - - - X (mm) -.9" -.".".9" -.9" -.".".9" -.9"-.9" -.".".9".9" EH- EH-9 EH-8.98".97" % %..".79".7" %..".".9" %.".8" %.79".9" %.7...9" %.9".9"." %."." - - X (mm) - - - X (mm) - - - X (mm) -.79" -.9".9".79" -."-.7" -.79".79".7"." -." -.8" -.".".8"." Detecting distance vs. size and material of target (Typical) EH-. mm." using mm.79" steel plate EH-A.8 mm." using mm.79" steel plate.7.9".9"."."."." Y Target X t = mm.".....".7".".".8....".".".8" These graphs show variations in detecting distance (Y mm), obtained by using square metal plates (X x X x mm.", where X is varied) after adjusting the detecting distance of the sensor head to a stable detecting distance using the standard target. 8 8 8 8.8".".9".".7".8".".9".".7" Detecting distance vs. size and material of target (Typical)..8... EH-/S mm." using mm.79" steel plate EH-8/8S mm.8" using mm.79" steel plate EH-/S mm.8" using mm.79" steel plate.8."..9".7".9"..9".8"."..".."..".".8.8.".".".."..".8" 8 8 8 8 8 8.8".".9".".7".8".".9".".7".8".".9".".7".8".."
Long-distance Separate-amplifier EH- 7 mm." using mm.7" steel plate EH-A mm." using mm.7" steel plate EH- mm." using mm.79" steel plate.8".".".".".."."."."."..".".".8".8".8"..".".".".." 8 8.".7".79"."." 8 8.".7".79"."." 8 8.8".".9".".7" EH- mm." using mm.7" steel plate EH- 9 mm." using mm.7" steel plate EH- mm.7" using mm.7" steel plate 8."." 7.8".."."." 9.".7"." 7..".9"."." 8."."..8"..".8"."."."..".8" 8 8 8 8 7 8.".7".79".".".".7".79".".".9".8".97".7".9" EH- 8 mm.7" using mm.7" steel plate EH-9 mm.8" using mm.7" steel plate EH-8. mm." using mm.79" steel plate.9".77".8".7".8".7.7" 8.8".7"..".8".9"..".98".7".".79" 9.".7.".9"..9"..".".".." 7 8 8 8 8 8.9".8".97".7".9".7".7" 7.87".".".8".".9".".7" Hints on Correct Use Mounting type M screw Secure the sensor head with a screw at a position mm." or more from the tip of the head. (Tightening torque: N m max.) Threaded type When mounting the threaded-type sensor head, do not tighten beyond the torque specified in the following table.." Model Tightening torque mm min. E H-8 8 N m max. E H- N m max. E H- N m max. E H- N m max. E H- N m max. E H- N m max. E H- N m max. 7
Long-distance Separate-amplifier Wiring Use a coaxial cable to connect the sensor head to the amplifier. Limit the length of extension to within m.8' ( m.' for models EH- and EH-). Surrounding metal Shielded-type sensors can be flush-mounted in a metal base. of the non-shielded type, however, should be mounted according to the guidelines given below in order to minimize interference from the surrounding metal. ød d M odel D (mm min. ) d (mm min. ) EH-.79".9" EH-.8".9" EH-.77".79" EH- 7.7".98" EH-.9".8" EH-9.".8" Interference When installing two or more sensors of the same model face-to-face or in parallel, separate by the distance specified in the following table to prevent interference. Model D istance F ace-to-face (mm min. ) Parallel (mm min. ) EH-.8" ( )." No space required EH-A.8" ( )." No space required EH-(S)." ( )." No space required EH-8(S).9" ( 7).8" No space required EH-(S) 7.8" ( )." EH-." ( )." EH-A." ( ).".8" 9."." EH-.9" ( ).7".9" ( )." EH-." ( 7).8" EH-." ( 9)." EH-." ( )." EH- 8." ( 9).".".8" 9.8".8" EH-8 7.8" ( )." No space required [Note] The above figures apply when the trimmer is turned to its optimal position for stable detection. The figures in parentheses apply when an optional interference prevention adapter is connected parallel to the sensor head (Except for -X8). Contact KEYENCE for further information. Amplifier unit (-X8) Sensor cable end treatment Sensor cable connections To connect the sensor cable, insert the end of the cable through the entry port (), tighten the screw (), connect the core wire () to the terminal (), and then tighten the screw (). () Shield.".".9" 8 For connections to the EH-///9, contact KEYENCE for more information. Mounting/dismounting the amplifier unit on DIN rail or mounting bracket Hook the rear of the amplifier unit on the DIN rail. Push the amplifier unit forward to hook the front of the unit. To dismount the amplifier unit, push the unit forward and unhook the front of the unit. How to use the attached sticker Write the sensor number on the rectangular sticker Rectangular sticker and stick it on the dust cover. Stick the round sticker over the round cover hole if the sensitivity adjustment trimmer setting should not be changed. * Fold back the shielded cable over the sheath. () Round sticker 8
Long-distance Separate-amplifier Dimensions For CAD Data Download >>> s EH-.7" EH-.7" 8 EH-8.7" 8 EH-8 ø.8 ø." ø. ø." ø8 ø.".98" 8." ø coaxial cable ø.8" 8." ø. coaxial cable ø." 8." ø. coaxial cable ø." 8." EH-A.7" 8 EH-S.7" 8.7" 8 8." ø.8 ø. coaxial cable ø." ø." ø. ø." EH-8S EH- 9.7" 78.7" 8.7" Unit: mm ø. ø." ø. ø. ø." spiral tube ø." coaxial cable *Minimum bending radius:.9" 9.7" 78.7".7" ø8 ø.8 ø." ø7 ø." spiral tube ø.8" * Minimum bending radius:..8".7" 8 8." ø. ø." coaxial cable Inch EH-S ø." ø coaxial cable Across-flats:, t =.7", t=." M8 x P P.".7" 9.7" 78.7" 8.7" ø." ø7 ø.8 ø. ø." ø.8" spiral tube coaxial cable * Minimum bending radius:..8" Across-flats:, t =.", t=." M x P P." ø." ø. coaxial cable Across-flats:, t =.", t=." M x P P." EH-.7" 8." 8 ø." ø. coaxial cable Across-flats: 9, t =..7", t=." M x P P." EH-A."." 7.".8".9".9".8" Detecting."." surface.8.9".." 8.".." ø." ø. coaxial cable ø." x ø. mounting hole.".7 EH-.79".9" ø.8 ø." 8." ø coaxial cable ø.8" 9
Long-distance Separate-amplifier EH-."." 8." ø.7" ø. ø." ø. coaxial cable Across-flats:, t=.8", t=." M x P P." EH-.79".9" ø ø.87" Across-flats: 9,.7" t=. t=." 8." ø." ø. coaxial cable M x P P." Unit: mm Inch EH-.98".79" 8." EH-.8".98" 8." ø ø.8" Across-flats: 9,.7" t=. t=." ø." ø. coaxial cable M x P P." ø ø.7" Across-flats: 9,.7" t=. t=." ø." ø. coaxial cable M x P P." EH-9." 9.99" 7 8." Teflon cap (for protection against welding spatter) OP-9 (for EH-8) OP-8 (for EH-) ø."." ø ø."." ø.".".99" 9 7." Detecting surface ø." ø. coaxial cable x ø. ø." coaxial cable ø8. ø." OP-7 (for EH-) ø.79"." ø." M x P P.".8".8".9" M x P P."
Long-distance Separate-amplifier Amplifier units -DC/-AC x ø. ø.8" mounting hole.". -AC/-AC x ø. ø.8" mounting hole Unit: mm." Inch.7" 78 7.7". 8.9".8"." 7.7"." 7.8" (.) 7.9" (.9").9".8".7".77" -X8 ø." ø, -core x.mm Cable length : m.' 8.7"."..".9" 8."."."."..".98".."." * Detail of slot.".8".8" ø." Slot*. ø. mounting hole