DT900020 Red Lion Controls, DT900020 Datasheet - Page 2

• Manufacturer Part Number: DT900020
• Description: RATE INDICATOR ADJ RED BACKLIGHT
• Manufacturer: Red Lion Controls
• Series: DITAK 9r

Specifications of DT900020

• Count Rate: 10kHz
• Number Of Digits/alpha: 5
• Input Type: Voltage
• Voltage - Supply: 9 V ~ 28 V
• Display Type: LCD Backlit
• Output Type: -
• Other names: Q2638618

EMC INSTALLATION GUIDELINES
ElectroMagnetic Interference (EMI), proper installation and wiring methods
must be followed to ensure compatibility in each application. The type of the
electrical noise, source or coupling method into the unit may be different for
various installations. In extremely high EMI environments, additional measures
may be needed. Cable length, routing and shield termination are very important
and can mean the difference between a successful or a troublesome installation.
Listed below are some EMC guidelines for successful installation in an
industrial environment.
1. Use shielded (screened) cables for all Signal and Control inputs. The shield
2. Never run Signal or Control cables in the same conduit or raceway with AC
WIRING CONNECTIONS
on the back of the unit. All conductors should meet voltage and current ratings
for each terminal. Also cabling should conform to appropriate standards of good
installation, local codes and regulations. It is recommended that power supplied
to the unit (AC or DC) be protected by a fuse or circuit breaker. When wiring
the unit, use the label to identify the wire position with the proper function.
Strip the wire, leaving approximately 1/4" bare wire exposed (stranded wires
should be tinned with solder). Insert the wire into the screw-clamp terminal and
tighten the screw until the wire is clamped tightly. Each terminal can accept up
to two #14 AWG wires.
Terminal and the Common Terminal.
SPECIFICATIONS (Cont’d)
8. ENVIRONMENTAL CONDITIONS:
9. WEIGHT: 3.3 oz (93.5 g)
Although this unit is designed with a high degree of immunity to
(screen) pigtail connection should be made as short as possible. The
connection point for the shield depends somewhat upon the application.
Listed below are the recommended methods of connecting the shield, in order
of their effectiveness.
a. Connect the shield only at the panel where the unit is mounted to earth
b. Connect the shield to earth ground at both ends of the cable, usually when
c. Connect the shield to common of the unit and leave the other end of the
power lines, conductors feeding motors, solenoids, SCR controls, and
heaters, etc. The cables should be run in metal conduit that is properly
The electrical connections are made via rear screw-clamp terminals located
The backlighting for a backlight version unit is powered between the V+
Power Frequency magnetic fields
Voltage dip/interruptions
Emissions
Notes:
1. Criterion A: Normal operation within specified limits.
Refer to the EMC Installation Guidelines section of this bulletin for
Operating Temperature: 0 to 75°C (Above 50°C derate backlight
Storage Temperature: -30 to 80°C
Operating and Storage Humidity: 85% max. relative humidity (non-
Altitude: Up to 2000 meters
ground (protective earth).
the noise source frequency is above 1 MHz.
shield unconnected and insulated from earth ground.
additional information.
operating voltage to 26 VDC max.)
condensing) from 0°C to 75°C.
EN 61000-4-8
EN 61000-4-11
EN 55022
Criterion A
30 A/m
Criterion A
0.5 cycle
Class B
2
3. Signal or Control cables within an enclosure should be routed as far away as
4. In extremely high EMI environments, the use of external EMI suppression
5. Long cable runs are more susceptible to EMI pickup than short cable runs.
Variable Frequency AC Inputs, Signal Source Powered
Variable Frequency AC Inputs, Signal Source Powered
Logic Pulse Inputs From Other Circuits & Sensors
grounded. This is especially useful in applications where cable runs are long
and portable two-way radios are used in close proximity or if the installation
is near a commercial radio transmitter.
possible from contactors, control relays, transformers, and other noisy
components.
devices, such as ferrite suppression cores, is effective. Install them on Signal
and Control cables as close to the unit as possible. Loop the cable through the
core several times or use multiple cores on each cable for additional protection.
Install line filters on the power input cable to the unit to suppress power line
interference. Install them near the power entry point of the enclosure. The
following EMI suppression devices (or equivalent) are recommended:
Ferrite Suppression Cores for signal and control cables:
Line Filters for input power cables:
Note: Reference manufacturer’s instructions when installing a line filter.
Therefore, keep cable runs as short as possible.
Fair-Rite # 0443167251 (RLC #FCOR0000)
TDK # ZCAT3035-1330A
Steward #28B2029-0A0
Schaffner # FN610-1/07 (RLC #LFIL0000)
Schaffner # FN670-1.8/07
Corcom #1VR3
Minimum V
AC
for operation is 0.9 V peak.
BLOCK DIAGRAM