CONTROLS CONTROLS
5
Products and specifications subject to change without notice.
Consult factory for application assistance.
204 Airline Drive, Suite 300, Coppell, Texas 75019 / Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
5-25
EUS and EUSF SERIES
VOLTAGE CONTROL RELAY
UL cUL listed
• Units Check Their Own Supply Voltage Level
• EUS SERIES – Over or Under Voltage Selectable
• EUSF SERIES – Monitors High and Low Voltage
• Space Saving 22.5mm Wide – DIN-Rail / Surface Mount
ORDERING INFORMATION:
Part Number Type Supply Voltage
84 872 040 EUS 12 VDC
84 872 046 EUS 20 to 80 VAC/VDC
84 872 047 EUS 90 to 270 VAC/VDC
84 872 056 EUSF 20 to 80 VAC/VDC
84 872 057 EUSF 90 to 270 VAC/VDC
MODE OF OPERATION:
SPECIFICATIONS:
Input power........................
Max. power consumption ............
Frequency of measured signal........
Threshold value ....................
Hysteresis.........................
Display accuracy ...................
Delay on threshold overun ...........
Output ............................
Contact material....................
Maximum loading...................
Maximum switching voltage ..........
Operating temperature ..............
Storage temperature ................
Weight ............................
EUS: EUSF:
12 VDC, —
20 to 80 VAC/VDC 20 to 80 VAC/VDC
90 to 270 VAC/VDC 90 to 270 VAC/VDC
3.5 VA
50/60 Hz
EUS: EUSF:
9.6 to 15.6 VDC —
20 to 80 VAC/VDC 20 to 80 VAC/VDC
65 to 260 VAC/VDC 65 to 260 VAC/VDC
EUS: EUSF:
5 to 20% Adjustable Fixed at 5%
±10% of full scale
.1 to 3 sec.
SPDT relay
AgCdO
8 Amp resistive
250 VAC
-4°F to 140°F, (-20°C to 60°C)
-22°F to 158°F, (-30°C to 70°C)
4.9 oz. (140g)
DIMENSIONS: inches (mm)
WIRING:
High threshold
Low threshold
Hysteresis
Hysteresis
Unit power-up
Controlled
voltage
EUSF
Threshold Ue
Threshold Ue
Hysteresis
Hysteresis
UPPER function
Unit power-up
Controlled voltage
Controlled voltage
EUS
VOLTAGE CONTROL WITHOUT MEMORY
UNDER function
Threshold Ue
Threshold Ue
Hysteresis
Hysteresis
UPPER function
Unit power-up
Controlled voltage
Controlled voltage
EUS
VOLTAGE CONTROL WITH MEMORY
UNDER function
memory
memory
OPERATING PRINCIPLE:
EUS SERIES
Control of AC / DC voltage without memory
When the value of the controlled voltage, AC or DC, reaches the threshold
Ue displayed on the front face, the output relay changes state at the end of
a time delay T which can be set on the front face at between 0.1 and 3 s.
Once the voltage drops below 5 to 50% of the threshold (hysteresis), the
output relay changes state again instantly. Changing the hysteresis on the
front face does not therefore modify the value of the preset threshold.
Control of AC / DC voltage with memory
When the value of the controlled voltage, AC or DC, reaches the threshold
Ue displayed on the front face, the output relay changes state at the end of
a time delay T which can be set on the front face at between 0.1 and 3 s,
and stays locked in this position.
EUSF SERIES
The EUSF window threshold relay monitors an electrical voltage which acts
as its own power supply (simplified wiring). When the value of the controlled
voltage, AC or DC, goes outside the window, the output relay deenergises at
the end of a time delay T which can be set on the front face at between 0.1
and 3 s.
It switches back on when the voltage returns within the window and stays
between the upper and lower thresholds displayed by two potentiometers
on the front face. Fixed hysteresis ensures bounce-free relay switching
around the thresholds.
Note: Time delay T1 on crossing the upper and lower thresholds offers immunity to transient
phenomena, thus preventing spurious triggering of the output relay.
A1
A21214
11
11
1412
A1 & A2 power supply
3.10˝ (78.5)
3.53˝ (89.7)
3.92˝ (99.3)
(22.5)
.89˝
.17˝
(4.2)
2.25˝ (57)
.20˝
(5)
.14˝
(3.5)
3.94˝ (100)
2.84˝ (72)
