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ABILITY TO LOCK OUT FRONT PANEL FUNCTIONS

SEALED FRONT PANEL CONSTRUCTION (NEMA 4/IP65)

ONE OR TWO PRESET VERSIONS

0.5" HIGH LIQUID CRYSTAL DISPLAY OR 0.4" HIGH LED DISPLAY

ACCEPTS INPUT COUNT RATE UP TO 2500 CPS

BI-DIRECTIONAL COUNTING

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

FRONT PANEL PROGRAMMABLE DECIMAL POINTS

MEETS DIN PANEL MOUNT SPECIFICATIONS

REMOTE RESET CAPABILITY

NON-VOLATILE MEMORY (E

PROM)

ON-LINE SELF-TEST

DESCRIPTION

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

to one or two preset level requirements. The LIBC1 and LIBC1E are the single
preset versions and the LIBC2 and LIBC2E are the dual preset versions. All four
units have a solid-state output and a Form C relay output for each preset. These
units feature input configuration programmability, a full complement of control
inputs, programmable timed outputs, non-volatile memory, and many other
features which will satisfy most any single or dual preset level requirement.

The Libra counters have two main counting actions, Reset to Zero

(RTZ)

and

Reset to Preset

(RTP)

. With RTZ, the counter resets to zero and counts up

(if

UP/DN terminal is at high level)

and activates the outputs when the preset

value

(s)

are reached. When RTP is used, the unit starts at the preset value and

counts down

(if the UP/DN terminal is at low level)

and activates the output

when zero is reached. For the 2-preset version, the count starts at preset 2 and
counts toward zero. Output 1 fires when preset 1 value is reached and output 2
fires when the count reaches zero. There are eight modes of operation for the
single preset unit and sixteen modes of operation for the dual preset unit.

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 counters have an internal non-volatile memory

device which eliminates the need for battery back-up. When input power is
removed, this device will maintain all data necessary for system operation. A
Program Disable terminal is available, 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 counters 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 counts or missing a preset value.

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

located at the rear of the unit. These strips can accept one #14 AWG stripped
wire. DIP switches at the rear of the unit are used to program the input
configuration and to set the desired operating modes.

The Libra Series counters 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.

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear in the

manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

Do not use this unit to directly command motors, valves, or other actuators

not equipped with safeguards. To do so, can be potentially harmful to persons
or equipment in the event of a fault to the unit.

MODEL LIBC - LIBRA SERIES COUNTERS (LCD & LED)

DIMENSIONS In inches (mm)

Note: Recommended minimum clearance (behind the panel) for

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

CAUTION:

Read complete instructions

prior to installation

and operation of the unit.

CAUTION:

Risk of electric shock.