description the units are rugged, incremental encoders that convert shaft rotation into a current sinking pulse train. internally, a single l.e.d. light source and a photologic sensor in conjunction with a shaft-mounted, durable, metal-etched encoder disc, provides signal accuracy and reliability to 50 khz. the dc input power supply requirement is a versatile +8 to +28 vdc, and is reverse polarity protected. the npn open collector transistor output is current limited to 40 ma and is compatible with most rlc counters, rate indicators, controllers and accessories. all units are packaged in a rugged cast aluminum housing with a gasketed, rear aluminum cover. the 3/8" (9.53 mm) diameter heavy duty stainless steel shaft and sealed, lifetime-lubricated precision ball bearings are preloaded for minimum end play and rated for continuous use up to 6000 rpm. they are designed to meet nema 13/ip54 environmental requirements. all units are supplied with 10 feet (3m) of pvc jacketed 4-wire, 22 awg cable with stranded shield wire and 100% foil shield coverage. model zch - quadrature output rotary pulse generator model zfh and zgh - quadrature output length sensors (replaces models rpgq, lsqs and lsqd respectively) rotary pulse generator the zch can be direct-coupled to a machine shaft by means of a flexible bellows, spring or rubber sleeve type coupler, etc., that allows for axial and radial misalignment. they can also be coupled with instrument timing belts and pulleys or gears. the housing may be rigidly face-mounted with the 4, #8-32 threaded holes. the 4-wire shielded cable exits through a cord connector. length sensor the length sensors are available in both single ended shaft (zfh) and double ended shaft (zgh) versions, both of which include a stainless steel handle tube for mounting and 10 feet (3.05 m) of 4-wire shielded cable. when mounted to a length sensor hinge clamp assembly (see model lsahc001) and coupled with one or two measuring wheels (see measuring wheels) , a low cost, versatile and highly accurate length measurement system can be configured. length sensor measurement accuracy factors which affect measurement accuracy include measuring wheel accuracy and wear, and material conditions. ideally, materials which are hard, thin and strong provide good readings. conversely, soft, thick and elastic materials can present problems in obtaining true readings. count or rate indicators with ?input scaling? can compensate for measuring wheel wear and material elasticity and compliance errors. length sensor accessories the length sensor hinge clamp assembly provides an easy method for attachment & mounting the length sensors and lscb1 conversion bracket. the removable top on the solid aluminum lsahc mounting block allows quick installation of the length sensor handle tube and provides secure clamping retention. the mounting block steel shaft pivots freely in oil impregnated sintered bronze bushings, and aluminum right angle brackets allow mounting the assembly via clearance holes for 1/4" (6.35 mm) dia. bolts (see lsahc dimensions & mounting). open collector output wiring the zch, zfh, and zgh series of sensors have open collector outputs. an open collector output brings the uncommitted collector of the encoder switching device to the external world. because the collector element is not associated with the sensor supply voltage, the sensor output collector may be ?pulled up? to external voltages (40 vdc max.) different than the encoder supply voltage . npn open collector outputs are current sinking devices. an output signal will not be generated unless a pull-up resistor is connected from the open-collector to the positive side of an external supply. the same supply can be used for powering the unit and for the pull-up resistor. 1 bulletin no. zch/zfh-a drawing no. lp0738 effective 10/09 tel +1 (717) 767-6511 fax +1 (717) 764-0839 www.redlion.net ? ?? 100, 200 & 500 pulses per revolution ? ?? quadrature current sinking outputs to 50 khz for position measurement, bi-directional counting and systems with mechanical backlash ? ?? sealed precision ball bearings ? ?? rugged cast aluminum housing ? ?? 3/8" dia. stainless steel shaft ? ?? wide input supply voltage range & low current operation ? ?? various cable lengths available + + + + + 1.25 (31.8) 0.75 0.022 (0.56) 0.05 (1.3) 1.65 (42) 0.08 2.00 1.20 0.13 3.38 2.75 2.00 (50.8) dia. mounting face 0.375 (9.53) dia. shaft #8-32 unc x0.30" (7.6) dp. 4 pl., equally spaced 1.50 (38.1) dia. bolt circle 0.99 (25.1) dia flange (2) (19) (50.8) (85.8) (69.9) (30.5) (3.3) zch dimensions in inches (mm)
specifications electrical specifications 1. supply voltage: +8 to +28 vdc (including power supply ripple) @ 50 ma max. (30 ma typ.) ; reverse polarity protected. 2. outputs: npn open collector transistor, v oh = 30 vdc max., v ol = 1 v max @ 40 ma. output current is limited to 40 ma. incremental - two square waves in quadrature with channel a leading b for clockwise rotation. 3. output frequency: up to 50 khz 4. output duty cycle: channel a & b: 50/50 nominal. (see figure 1, note 3) 5. quadrature output phase: 90 15 (see figure 1, note 3) 6. cable connections: red = +vdc; black = common; white = channel a output; green = channel b output. mechanical specifications 1. maximum mechanical speed: 6000 rpm 2. radial shaft load: 15 lbs. max. (66.7n) 3. axial shaft load: 15 lbs. max. (66.7n) 4. starting torque: 3 oz.-in. (21.2n-mm) 5. moment of inertia: single shaft = 1.03 x 10 -4 oz. - in. - sec. 2 (7.30 x 10 -4 n - mm - sec 2 ) dual shaft = 1.30 x 10 -4 oz. - in. - sec. 2 (9.21 x 10 -4 n - mm - sec 2 ) 6. operating temperature: 0c to +70c 7. weight (less cable): zch: 14.3 oz (406 g) zfh: 22.0 oz (623 g) zgh: 22.7 oz (643 g) 1.65 0.08 (2.03) 0.75 0.04 1.20 max. (30.5) (41.9) (1.0) (19.0) zfh dimensions in inches (mm) .75 (19) dia. 2.75 (69.8) 2.06 (52.3) 2.00 (50.8) .13 (3.3) 3.38 (85.8) 2.75 (69.9) 4.00 (101.6) 1.65 (41.9) 0.375 (9.52) dia. shaft 2.00 (50.8) dia. .04 (1.0) .08 (2.03) max. usable shaft length 1.08 (27.4) ref., typ. 2 .75 (19.0) typ. 2 .022 (.56) typ. 2 zgh dimensions in inches (mm) this is the side view of the model zfh. all other dimensions (including the handle tube) are the same as the model zgh. see below. 2 led regu- lator red wht blk common 8-28vdc @ 30ma v = 30vdc max. v = 1v max. @ 40ma ol oh shaft metal etched optical disc bare stranded shield wire connected to instrument common for increased noise immunity sensor array (typ.) 50ma max. grn channel a channel b equivalent circuit & connections model no. description ppr part number 100 100 100 zgh0100c zfh0100c zch0100c -- 200 200 200 zgh0200c zfh0200c zch0200c 500 500 500 zgh0500c zfh0500c ZCH0500C zgh zfh zch length sensor double shaft (replaces lsqd) length sensor single shaft (replaces lsqs) rotary pulse generator (replaces rpgq) rpgfc002 -- -- -- flexible coupling (1" length) 0.375" - 6 mm flexible coupling (1" length) 0.375" - 0.500" flexible coupling (1" length) 0.375" - 0.375" rpgfc rpgfc006 rpgfc004 rpgfc003 flexible coupling (1" length) 0.250" - 0.375" note: for 25 foot cable, replace the last character of the part number (?c?) with ?d?. for 50 foot cable, replace the last character of the part number (?c?) with ?e?. ordering information notes: 1. channel a leads channel b for clockwise shaft rotation when viewed from housing front. conversely, channel b leads channel a for counterclockwise shaft rotation. 2. the number of lines on the optical disc determines the pulses per revolution (ppr). 3. duty cycle is the relationship of output ?high? time, ?a?, to output ?low? time, ?b?, and is expressed as a high/low percentage ratio, ie....% high time = a/(a+b) x 100; % low time = b/(a+b) x 100. 4. quadrature phase ?c? is specified as the lead or lag between channel a & b in electrical degrees. nominally 90 (1/4 cycle). length sensor mounting consideration 1. length sensors should be mounted so measuring wheel (s) contact ribbon, strip or web as it passes over a roller. as an alternative, wheel (s) can be driven by roller surface next to material being measured. 2. note: the weight at the length sensor unit provides sufficient traction for accurate operation when mounted, with arm angle from horizonal not exceeding 30 o . 3. tension on signal cable can cause wheel (s) to lift. make sure cable is clamped to machine frame near the unit and allow slack. v ol v oh common oh v ol v common c.w. c.c.w. shaft rotation (note 1) chan. b chan. a (note 4) "c" "a" "b" (note 3) 1 cycle (360) (note 2)
3 when the desired output of a length sensor and wheel combination is either in inches, feet, yards, or meters selection of the proper combination is relatively straight forward. for example, with a 1-foot wheel circumference, a 1 ppr rotary pulse generator will deliver 1 pulse/ft, 12 ppr would deliver 12 pulses/ ft (1 pulse/inch); 100 ppr would yield 100 pulses/ft; and 120 ppr would permit measuring to 1/10th of an inch (1/120th of a foot). length sensor accessories separate length measuring wheels - dimensions in inches (mm) cast alum. .376" (9.6) bore +.001" -.000" 8-32 unf set screw 3/8" (9.5) round section replaceable tire .210" section dia. black neoprene diamond knurled aluminum tread 10-32 unf set screw 1" (25.4) alum. cast .376" -.000" +.001" (9.6) bore .376" (9.6) bore +.001" -.000" tan, smooth polyurethane tread 10-32 unf set screw alum. cast 1" (25.4) of wheel code ok wheel code for use on: metal, paper, foil, film and hard plastics. line contact on material being measured, convenient when available measuring track is narrow or for measuring on end of roller beside passing material. max. speed: 600 rpm for use on: soft, smooth materials such as soft paper, matting, cardboard, fine weave textiles. broad wheel tread minimizes contact pressure and tan polyurethane tread minimizes marking. max. speed: 600 rpm balanced version of 1ft. circumference available. balanced to ansi s2.19- 1989 quality grade 6.3 @ 3000 rpm. for use on: rubber, coarse weave fabrics, rough wood surfaces, foam, insulation. max. speed: 600 rpm balanced version of 1ft. circumference available. balanced to ansi s2.19- 1989 quality grade 6.3 @ 3000 rpm. selecting appropriate wheel size & ppr (pulses per rev.) of rotary pulse generator wheels & replacement tires for code or wheels note: after installation of measuring wheels, ensure guards,shields or other devices are in place to protect personnel from rotating equipment. or wheel code circumference part number 1 foot (1/3 yd) 0.40% wf1000or or 1/3 meter 0.40% wm0333or 4/10ths yard 0.40% wy0400or 4/10ths meter 0.40% wm0400or 1 foot (1/3 yd) 0.35% wf1000of of 1/3 meter 0.30% wm0333of 4/10ths yard 0.30% wy0400of 4/10ths meter 0.30% wm0400of bf (balanced) 1 foot (1/3 yd) 0.40% wf1000bf wheel code tolerance wheel code circumference tolerance part number 1 foot (1/3 yd) 0.35% wf1000ok ok 1/3 meter 0.30% wm0333ok 4/10ths yard 0.30% wy0400ok 4/10ths meter 0.30% wm0400ok bk (balanced) 1 foot (1/3 yd) 0.35% wf1000bk replacement tires for or wheels 1 foot (1/3 yd) torf1000 1/3 meter torm0333 4/10ths yard tory0400 4/10ths meter torm0400 ordering information
limited warranty the company warrants the products it manufactures against defects in materials and workmanship for a period limited to two years from the date of shipment, provided the products have been stored, handled, installed, and used under proper conditions. the company?s liability under this limited warranty shall extend only to the repair or replacement of a defective product, at the company?s option. the company disclaims all liability for any affirmation, promise or representation with respect to the products. the customer agrees to hold red lion controls harmless from, defend, and indemnify rlc against damages, claims, and expenses arising out of subsequent sales of rlc products or products containing components manufactured by rlc and based upon personal injuries, deaths, property damage, lost profits, and other matters which buyer, its employees, or sub-contractors are or may be to any extent liable, including without limitation penalties imposed by the consumer product safety act (p.l. 92-573) and liability imposed upon any person pursuant to the magnuson-moss warranty act (p.l. 93-637), as now in effect or as amended hereafter. no warranties expressed or implied are created with respect to the company?s products except those expressly contained herein. the customer acknowledges the disclaimers and limitations contained herein and relies on no other warranties or affirmations. the length sensor hinge clamp assembly provides an easy method for attachment and mounting of the length sensors and lscb1 conversion bracket. the removable top on the solid zinc lsahc mounting block allows quick installation of the length sensor handle tube and provides secure clamping retention. the mounting block pivots freely in zinc right angle brackets to allow mounting the assembly via clearance holes for 1/4" dia. bolts. the lock washers must be used as indicated (between the bolt head and the top clamp piece). assemble the top clamp piece as follows. 1. tighten both bolts so that the top clamp half draws down evenly on the sensor tube. 2. tighten the bolts until both lock washers are flat. 3. then turn each bolt an additional ? to ? turn. ordering information .88 (22.4) 2.9 (73.7) 3.4 (86.4) 2.5 (63.5) 1.25 (31.8) .25 (6.3) lock washers (2) must be installed between bolt heads and top clamp piece. e-clip retaining ring (2) must be installed in slots. 5.70 (144.8) 4.50 (114.3) (50.8) (38.1) 0.75 0.75 (19.0) 4x ? 0.31 (7.9) 2.00 1.50 (19.0) single wheel 2.93 (74.4) dual wheel 4 (101.6) (21.6) .85 single shaft units this wheel and shaft omitted on .88 (22.4) wheel radius 1.9 (48.3) 6.9 (175.3) front view top view dimensions in inches (mm) caution: downward tension on signal cable can cause wheel(s) to lift. make sure cable is clamped to machine frame near encoder and allow slack. note: the weight at the length sensor unit provides sufficient traction for accurate operation when mounted as shown, with arm angle from horizontal not exceeding 30, and with hinge clamp toward the far extreme of the extension arm. length sensors should be mounted so measuring wheel(s) contact ribbon, strip or web as it passes over a roller. as an alternative, wheel(s) can be driven by roller surface next to material being measured. model no. description part number lsahc lsahc001 length sensor hinge clamp assembly model lsahc - length sensor hinge clamp assembly model zgh shown model zfh shown red lion controls headquarters 20 willow springs circle york pa 17406 tel +1 (717) 767-6511 fax +1 (717) 764-0839 red lion controls china unit 101, xinan plaza building 13, no.99 tianzhou road shanghai, p.r. china 200223 tel +86 21 6113-3688 fax +86 21 6113-3683 red lion controls europe printerweg 10 nl - 3821 ad amersfoort tel +31 (0) 334 723 225 fax +31 (0) 334 893 793 red lion controls india 54, vishvas tenement gst road, new ranip, ahmedabad-382480 gujarat, india tel +91 987 954 0503 fax +91 79 275 31 350
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