Red Lion Libra Timer User Manual

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! 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

2

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 [phone]
Fax [phone]
www.redlion.net

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SPECIFICATIONS

1. 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 Operation: 115/230 VAC (±10%), 50/60 Hz, 6 VA (LCD) or 9 VA

(LED).

DC Operation: 11 to 14 VDC @ 0.2A max (LCD) or 0.3 A max (LED).

3. SENSOR POWER: 10 to 16 VDC @ 150 mA.

4. RUN INPUT: Can accept switch contact closure and NPN Open Collector

outputs and similar types of current sinking inputs. VIL= 1 V max., internally
pulled up to 5 VDC through a 10 KΩ resistor (I

SNK

= 0.5 mA). Response

time = 5 msec to 15 msec. (These units operate with VCM [E-H] modules.)

5. TIME ACCURACY: ±0.01%

6. CONTROL INPUTS:
Remote Reset: Active low (VIL= 1 V max.), internally pulled up to 5 VDC

through a 10 KΩ resistor (I

SNK

= 0.5 mA). Response time = 10 msec. A

low will reset the unit and deactivate the outputs.

Program Disable: Active low (VIL= 0.5 V max.), internally pulled up to 5

VDC through a 10 KΩ resistor (I

SNK

= 0.5 mA). A low will inhibit the
changing of presets and timed outputs, as well as the testing of outputs in
self-test.

7. OUTPUTS:
Solid-State: Current sinking NPN open collector transistors. I

SNK

= 100 mA

max. V

OH

= 30 VDC max. (Internal Zener diode protection). One solid-

state output for each preset level. VOL= 1 VDC max. @ 100 mA.

Relay(s): Form C contacts max. rating 5 amps @ 120/240 VAC, 28 VDC

(resistive load), 1/8 H.P. @ 120 VAC (inductive load). The operate time is
5 msec nominal and the release time is 3 msec nominal.

Relay Life Expectancy: 100,000 cycles at max. rating. (As load level

decreases, life expectancy increases.)

Programmable Timed Output: The timed output can be programmed from

0.01 sec to 99.99 sec, ±0.01% - 10 msec. The timed output is set for 0.1
sec at the factory.

8. MEMORY RETENTION: The Libra Timers have a “no power E2PROM”
which maintains all information when the input power is removed. The life
expectancy of this device is at least 10,000 power down cycles and length of
memory retention for a single power down can be as long as 10 years.

9. INPUT, POWER, AND OUTPUT CONNECTIONS: There are two plug-
in, compression type, barrier strips located at the rear of the unit. These strips
can be removed from the rear of the unit for ease of wiring. After wiring is
complete, the connector can be plugged back into the unit.

10. CERTIFICATIONS AND COMPLIANCES:

SAFETY

Type 4 Indoor Enclosure rating (Face only), UL50

IEC 1010-1, EN 61010-1: Safety requirements for electrical equipment

for measurement, control, and laboratory use, Part 1.

IP65 Enclosure rating (Face only), IEC529

ELECTROMAGNETIC COMPATIBILITY

Note:

1. Metal bezel of unit connected with ground lead from rear bezel screw to
metal mounting panel.

2. When the unit is DC powered from terminal TBA pin 5 (common) and
terminal TBB pin 6 (+12 VDC) a power line filter was installed, RLC
#LFIL0000 or equivalent, so as not to impair the function of the unit.

Refer to the EMC Installation Guidelines for additional information.

11. ENVIRONMENTAL CONDITIONS:
Operating Temperature: 0°C to 50°C
Storage Temperature: -40°C to 70°C
Operating and Storage Humidity: 85% max (non-condensing)

from 0 to 50°C

Altitude: Up to 2000 meters

12. CONSTRUCTION: Metal die-cast bezel with black, high impact plastic
insert. Front panel meets NEMA 4/IP65 requirements for indoor use when
properly installed. (Panel gasket and mounting clips included with unit.)
Installation Category II, Pollution Degree 2

13. WEIGHT: 1.5 lbs. (0.68 kg) [LCD], 1.75 lbs. (0.79 kg) [LED]

SELECTION OF MODES OF OPERATION, TIME
RANGE VALUE, POWER-UP RESET, & FRONT
PANEL RESET

The selection of Modes of Operation, Time Range, Power-Up Reset, and

Front Panel Reset is accomplished by a ten-position DIP switch, located at the
rear of the unit, in the upper right-hand corner. DIP switches 1-4 are used to set
the desired mode of operation, while DIP switches 5-8 are used to determine the
time range setting. DIP switch 9 is used to determine whether the unit, on power­up, is to restore or reset the time value. When this switch is up, the time value,
displayed before power loss, will be restored and will be operated on as before
power loss. When the switch is down, the unit will reset the time value to either
zero (RTZ) or to the preset value (RTP) when input power is restored. DIP switch
10 is used to enable or disable the front panel reset button. When the switch is
up, the front panel reset button is disabled. When the switch is down, the front
panel reset button is enabled. The selection of Mode of Operation will be
discussed first followed by the selection of Time Range Value.

BLOCK DIAGRAM

Power mains class B

Enclosure class BEN 55011RF interference

Emissions to EN 50081-2

Level 4; 30 A/m

150 KHz - 80 MHz

EN 61000-4-8

Level 3; 10 V/rms

2

EN 61000-4-6RF conducted interference

Level 3; 2 Kv power

Level 4; 2 Kv I/O

2

EN 61000-4-4Fast transients (burst)

80 MHz - 1 GHz

Level 3; 10 V/m EN 61000-4-3Electromagnetic RF fields

Level 3; 8 Kv air

Level 2; 4 Kv contact

1

EN 61000-4-2Electrostatic discharge

Immunity to EN 50082-2

Power frequency magnetic fields

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MODE 0 LATCH OUTPUT AT PRESET, MANUAL RESET TO ZERO, TIME

STOPS AT PRESET (ACCUMULATING DELAY ON MAKE, TIME UP)

In this mode, as the unit times up from zero, the output will
latch-on when the preset is reached. Also, the unit will stop timing
when preset is reached. When a manual reset✰ occurs, the unit will
Reset to Zero and the output if latched on, will unlatch.

To use as a DELAY ON MAKE timer, set the preset value to the desired
delay value. When “RUN” is at a low level, time will increment. The output
will activate when the preset is reached. To recycle use 1) reset, or 2) set the
power-up reset switch to enable, then remove and reapply input power.

MODE 1 LATCH OUTPUT AT PRESET, MANUAL RESET TO ZERO, TIME

CONTINUES AT PRESET (ACCUMULATING DELAY ON MAKE,
TIME UP)

In this mode, as the unit times up from zero, the output will latch
on when the preset is reached. Time will continue to accumulate
after the preset is reached. When manual reset✰ occurs, the unit
will Reset to Zero, and the output, if latched on, will unlatch.

To use as a DELAY ON MAKE timer, follow the description under Mode 0.

MODE 2 & 3 - ✰✰
MODE 4 TIMED OUTPUT AT PRESET, MANUAL RESET TO ZERO, TIME

STOPS AT PRESET

In this mode, as the unit times up from zero, the output will turn
on when the preset is reached. The output will turn off after its
programmed time value has occurred. Also, the unit will stop
timing when the preset is reached. When a manual reset occurs, the unit will
Reset to Zero. Manual reset✰ will terminate the timed output, if the output is
still turned on.

MODE 5 TIMED OUTPUT AT PRESET, AUTOMA TIC RESET T O ZERO AFTER

TIMED OUTPUT (OFF/ON RECYCLING, TIME UP)

In this mode, as the unit times up from zero, the output will turn
on when the preset is reached. The output will turn off after its
programmed time value has occurred. Also, at the end of the timed
output, the unit will automatically Reset to Zero and start the cycle over.
Manual reset✰ will turn off the output, if turned on, and reset the time to zero.

When used as an OFF/ON RECYCLING timer, the total cycle time is the
sum of the preset value plus the programmed timed output value. The ON
delay value is equal to the programmed timed output value.✝✝ When “RUN”
is at a low level, time will increment. The output (ON delay) will activate when
the preset is reached. The unit will recycle at the end of the timed output.

MODE 6 TIMED OUTPUT AT PRESET, AUTOMATIC RESET TO ZERO AT

PRESET ✝(OFF/ON RECYCLING, TIME UP)

In this mode, as the unit times up from zero, the output will turn
on when the preset is reached. The output will turn off after its
programmed time value has occurred. Also, when the preset is
reached, the unit will automatically Reset to Zero and start the cycle over. (The
output will remain on until its time value has occurred.) Manual reset✰ will
turn off the output, if turned on, and reset the time to zero.

When used as an OFF/ON RECYCLING timer, the total cycle time is the
preset value. The ON delay value is equal to the programmed timed output
value.✝✝ When “RUN” is at a low level, time will increment. The output (ON
delay) will activate when the preset is reached. The unit will recycle at the
beginning of the timed output.

MODE 7 - ✰✰
✰ - Manual reset, either by front panel reset (if enabled) or remote reset, is

always active, and will override any condition or state of the timer.

✰✰ - These modes are not applicable to the single preset Libra timer (they are

used only for the two preset timer unit).

MODE 8 LATCH OUTPUT AT ZERO, MANUAL RESET TO PRESET TIME

STOPS AT ZERO (ACCUMULATING DELAY ON MAKE, TIME
DOWN)

In this mode, as the unit times down from preset, the output will
latch on when zero is reached. Also, the unit will stop timing when
zero is reached. When a manual reset✰ occurs, the unit will Reset
to Preset and the output, if latched on, will unlatch.

To use as a DELAY ON MAKE timer, set the preset value to the desired
delay value. When “RUN” is at a low level, time will decrement. The output
will activate when the zero is reached. To recycle use 1) reset, or 2) set the
power-up reset switch to enable, then remove and reapply input power.

MODE 9 LATCH OUTPUT AT ZERO, MANUAL RESET TO PRESET, TIME

CONTINUES AT ZERO (ACCUMULATING DELAY ON

In this mode, as the unit times down from preset, the output will
latch on when zero is reached. Time will continue to accumulate
after zero is reached. When a manual reset✰ occurs, the unit will
Reset to Preset, and the output, if latched on, will unlatch.

To use as a DELAY ON MAKE timer, follow the description under Mode 8.

MODE 10 & 11 - ✰✰
MODE 12 TIMED OUTPUT AT ZERO, MANUAL RESET TO PRESET, TIME

STOPS AT ZERO

In this mode, as the unit times down from preset, the output will
turn on when zero is reached. The output will turn off after its
programmed time value has occurred. Also, the unit will stop timing
when zero is reached. When a manual reset✰ occurs, the unit will Reset to Preset.
Manual reset✰ will terminate the timed output, if the output is still turned on.

MODE 13 TIMED OUTPUT AT ZERO, AUTOMATIC RESET TO PRESET

AFTER TIMED OUTPUT (OFF/ON RECYCLING, TIME DOWN)

In this mode, as the unit times down from preset, the output will
turn on when zero is reached. The output will turn off after the
programmed time value has occurred. Also, at the end of the timed
output, the unit will automatically Reset to Preset and start the cycle over.
Manual reset✰ will turn off the output, if turned on, and reset the time to the
preset value.

When used as an OFF/ON RECYCLING timer, the total cycle time is equal
to the sum of the preset value plus the programmed timed output value. The ON
delay value is equal to the programmed timed output value.✝✝ When “RUN” is
at a low level, time will decrement. The output (ON delay) will activate when
zero is reached. The unit will recycle at the end of the timed output.

MODE 14 TIMED OUTPUT AT ZERO, AUTOMATIC RESET TO PRESET AT

ZERO ✝(OFF/ON RECYCLING, TIME DOWN)

In this mode, as the unit times down from preset, the output will
turn on when zero is reached. The output will turn off after its
programmed time value has occurred. Also, when zero is reached,
the unit automatically resets the time to the preset value and starts the cycle
over. Manual reset✰ will turn off the output, if turned on, and reset the timer
to the preset value.

When used as an OFF/ON RECYCLING timer, the total cycle time is the
preset value. The ON delay value is equal to the programmed timed output
value.✝✝ When “RUN” is at a low level, time will decrement. The output (ON
delay) will activate when zero is reached. The unit will recycle at the beginning
of the timed output.

MODE 15 - ✰✰
✝ - The timed output value must be less than the value requir ed to time from the

reset condition to the preset point. Otherwise, the output will appear to be

latched on.

✝✝ - The maximum ON delay is 99.99 seconds.

Mode settings of the switches are shown to the right of the text below. The
mode number corresponds to a binary code, represented by the DIP switch
positions. When the switch is “UP”, it is equivalent to a zero. When the switch

is “DOWN”, it is equivalent to a one. The mode switch settings can be easily
observed from the panel front by using the self-test. Near the end of self-test,
the state of these mode switches are displayed.

MODES OF OPERATION

MODES OF OPERATION FOR SINGLE PRESET LIBRA TIMER

The Libra timers have internal diagnostics which will check the stored data
during power-up. When the data is saved (power-down), computations are made
with these values. The result of these computations is stored in the memory to
serve as a check against possible error. Then on power-up, these same
computations are repeated on the stored data. If these results do not agree with

the stored results, then a “P” will appear on the right side of the display. Normal
operation of the unit will continue while this “P” displayed. To remove the “P”
from the display, press the “E” button. Then check programmed values to be
certain they are correct.

POWER-UP DIAGNOSTICS