Bulletin No. ZFG/ZCG-B
Drawing No. LP0737
Released 12/10
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net
MODEL ZCG - SINGLE CHANNEL OUTPUT ROTARY PULSE GENERATOR
MODEL ZFG and ZGG - SINGLE CHANNEL OUTPUT LENGTH SENSORS
(Replaces MODELS RPGC, LSCS and LSCD respectively)
VARIOUS PULSE PER REVOLUTION (PPR) RATES
Up to 200 PPR for fine, high-resolution counting or
precision speed measurement from slow shaft speeds.
RUGGED CAST ALUMINUM HOUSING
3/8" DIA. STAINLESS STEEL SHAFT
WIDE INPUT SUPPLY VOLTAGE RANGE &
LOW CURRENT OPERATION
UP TO 10 KHz OUTPUT FREQUENCY
CURRENT SINK OUTPUT
EASY INSTALLATION
Eliminates air-gap, sensing distance, and beam
alignment procedures of other types of sensing.
LENGTH SENSORS AVAILABLE WITH:
Single or Dual Ended Shaft
SEALED PRECISION BALL BEARINGS
VARIOUS CABLE LENGTHS AVAILABLE
IDEAL FOR DUSTY, DIRTY ENVIRONMENTS
Where “Non Contact” sensing means are impractical.
ROTARY PULSE GENERATOR
DESCRIPTION
The ZCG 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 3-wire shielded cable exits through a cord connector.
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 10 KHz. The DC input power supply requirement is
a versatile +8 to +35 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 3-wire, 22 AWG cable with
stranded shield wire and 100% foil shield coverage. Operating Temperature
range is -18°C to +60°C.
LENGTH SENSOR
The length sensors are available in both Single Ended Shaft (ZFG) and
Double Ended Shaft (ZGG) versions, both of which include a Stainless Steel
Handle Tube for mounting and 10 feet (3.05 M) of 3-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. In addition, English/Metric
conversions may also be accomplished.
ZCG DIMENSIONS In inches (mm)
0.375
0.99 (25.1) DIA
FLANGE
(9.53)
DIA. SHAFT
0.08
(2)
1.50 (38.1) DIA.
BOLT CIRCLE
1.65 (42)
2.75
(69.9)
#8-32 UNC
Open Collector Output Wiring
x0.30" (7.6) DP.
4 PL., EQUALLY
SPACED
The ZCG, ZFG, and ZGG 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.
0.75
(19)
+
0.022
(0.56)
3.38
(85.8)
2.00
(50.8)
0.05 (1.3)
1.25
(31.8)
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.
0.13
(3.3)
1.20
2.00 (50.8)
(30.5)
DIA. MOUNTING
FACE
2. Note: The weight at the Length Sensor unit provides sufficient traction for
accurate operation when mounted, with arm angle from horizontal not
exceeding ±30o.
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.
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