Red-lion Libra Timer User Manual download pdf

! ONE OR TWO PRESET VERSIONS

! 11 SELECTABLE TIME RANGES

! 0.5" (12.7 mm) HIGH LIQUID CRYSTAL DISPLAY OR

0.4" (10.2 mm) HIGH LED DISPLAY

! SOLID-STATE CURRENT SINK OUTPUT(S)

! FORM C RELAY OUTPUT(S)

! PROGRAMMABLE TIMED OUTPUT (0.01 sec to 99.99 sec.)

! SIMPLE FRONT PANEL FOR PROGRAMMING EASE

! MEETS DIN PANEL MOUNT SPECIFICATIONS

! REMOTE RESET CAPABILITY

! INSTANTANEOUS & DELAYED CONTACTS

! NON-VOLATILE MEMORY (E

PROM)

! SEALED FRONT PANEL CONSTRUCTION (NEMA 4/IP65)

! ABILITY TO LOCK OUT FRONT PANEL FUNCTIONS

! FRONT PANEL RESET ENABLE/DISABLE

DESCRIPTION

The Libra Series of presettable timers is an economical and reliable solution

to one or two preset timing requirements. The LIBT1 and LIBT1E are the single

preset timer versions and the LIBT2 and LIBT2E are the dual preset timer

versions. All four units have a solid-state output and a form C relay output for

each preset. These units feature a full complement of control inputs,

programmable timed output values, non-volatile memory and many other

features which will satisfy most any single or dual preset timer requirement.

The Libra Timers have two main timing actions, Reset to Zero (RTZ) [Time

Up] and Reset to Preset (RTP) [Time Down]. With RTZ, the timer resets to zero,

times up, and activates the outputs when the preset value(s) are reached. When

RTP is used, the unit starts at the preset value, times down, and activates the

output when zero is reached (single preset unit). For the dual preset version, the

time starts at preset 2 and times toward zero. Output 1 fires when the preset 1

value is reached and output 2 fires when the time reaches zero. There are ten

modes of operation for the single preset unit and sixteen modes of operation for

the dual preset unit.

The Libra Timers also have eleven different selectable time range values.

These include: hours, minutes, or seconds; tenths of hours, minutes, or seconds;

hundredths of hours, minutes, or seconds; and two chronometer time functions

of minutes and seconds; and hours and minutes.

The timed output is programmed through the front panel buttons and can be

programmed from 0.01 sec. to 99.99 sec. (The unit’s timed output is set at the

factory to be 0.1 sec.) The Libra timers have an internal non-volatile memory

device which eliminates the need for battery back-up. When input power is lost,

this device will maintain all data necessary for system operation. A Program

Disable terminal is present, which is used to prevent accidental changes or

tampering by unauthorized personnel to the preset(s) or timed output value(s).

The front panel reset button can also be enabled or disabled by a rear panel DIP

switch. These timers also have an on-line self-test, which checks all display

driver and micro-processor hardware. The self-test can be run at any time

without losing time or missing preset value(s).

Power, input, and output connections are made via removable terminal blocks

located at the rear of the unit. These blocks can accept one #14 AWG stripped

wire. DIP switches at the rear of the unit are used to set the time ranges and to

set the desired operating modes.

The Libra Series timers have a metal die-cast front bezel, which is sealed, and

meets NEMA 4/IP65 specifications for wash-down and/or dust when properly

installed. Mounting clips are provided for easy panel installation.

MODEL LIBT - LIBRA SERIES TIMERS (LCD & LED)

DIMENSIONS In inches (mm)

Note: Recommended minimum clearance (behind the panel) for

mounting clip installation is 2.7"(69)H x 4.5"(114)W.

CAUTION: Read complete instructions prior

to installation and operation of the unit.

CAUTION: Risk of electric shock.

Bulletin No. LIBT-I

Drawing No. LP0104

Released 12/04

Tel +1 (717) 767-6511

Fax +1 (717) 764-0839

www.redlion.net

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - DIMENSIONS In inches (mm)

1! ONE OR TWO PRESET VERSIONS! 11 SELECTABLE TIME RANGES! 0.5" (12.7 mm) HIGH LIQUID CRYSTAL DISPLAY OR0.4" (10.2 mm) HIGH LED DISPLAY! SOLI

Page 2 - PANEL RESET

2SPECIFICATIONS1. DISPLAY:4-digit, 0.5" (12.7 mm) high LCD display.4-digit, 0.4" (10.2 mm) high LED display.2. POWER REQUIREMENTS:AC Operati

Page 3 - POWER-UP DIAGNOSTICS

3MODE 0 LATCH OUTPUT AT PRESET, MANUAL RESET TO ZERO, TIMESTOPS AT PRESET (ACCUMULATING DELAY ON MAKE, TIME UP)In this mode, as the unit times up fro

Page 4

4MODE 0 LATCH OUTPUTS AT PRESETS, MANUAL RESET TO ZERO, TIMESTOPS AT PRESET 2 (INSTANTANEOUS & TIME DELAYCONTACT, TIME UP)In this mode, as the un

Page 5

5MODE 8 LATCH OUTPUT AT PRESET 1 AND ZERO, MANUAL RESET TOPRESET 2, TIME STOPS AT ZERO (INSTANTANEOUS & TIMEDELAY CONTACT, TIME DOWN)In this mod

Page 6 - EMC INSTALLATION GUIDELINES

6TIME RANGE VALUETime Range switch settings are shown to the right of the chart below. Thetime range number corresponds to a binary code represented b

Page 7

7FRONT PANEL FUNCTION DESCRIPTIONThese units employ six front panel buttons for control and data entering. Thebutton functions are described below.RE

Page 8 - INSTALLATION

CURING/DRYING PROCESS CONTROLIn a typical manufacturing curing/drying process, it is required to control theduration of time heat is applied to the it

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Red-lion Libra Timer User Manual

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