2
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 KΩresistor (ISNK = 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 KΩresistor (ISNK = 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 KΩresistor (ISNK = 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. ISNK = 100 mA
max. VOH = 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 power-
up, 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/rms2
EN 61000-4-6RF conducted interference Level 3; 2 Kv power
Level 4; 2 Kv I/O2
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 contact1
EN 61000-4-2Electrostatic discharge
Immunity to EN 50082-2
Power frequency magnetic fields
