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)
