Data sheet
Voltage monitoring relays CM-ESS.1For single-phase AC/DC voltages
The CM-ESS.1 is an electronic voltage monitoring
relay that provides reliable monitoring of voltages
as well as detection of phase loss.
All devices are available with two different terminal
versions. You can choose between the proven
screw connection technology (double-chamber
cage connecting terminals) and the completely
tool-free Easy Connect Technology (push-in
terminals).
Characteristics
– Monitoring of DC and AC voltages (3-600 V)– TRMS measuring principle
– One device includes 4 measuring ranges
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– Over- or undervoltage monitoring configurable – Hysteresis adjustable (3-30 %) – 3 supply voltage versions – Precise adjustment by front-face operating controls – Screw connection technology or Easy Connect Technology available – Housing material for highest fire protection classification UL 94 V-0 – Tool-free mounting on DIN rail as well as demounting – 1 c/o (SPDT) contact – 22.5 mm (0.89 in) width |
Approvals / Marks A C R E L/ a b Classifcations: EN 50155, IEC 60571, NF F 16-101/102, EN 45545-2 EN 50155, IEC 60571
Coated pcb. T3 n n n – Cat 1, Class B no |
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– 3 LEDs for status indication |
NF F 16-101/102 EN 45545-2 Flammability Opticity and toxicity of Risk level index smoke index achieved |
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I2 F2 HL3 Order data
Voltage monitoring relays
Type Rated control supply voltage Connection technology Measuring ranges Order code
CM-ESS.1P 24-240 V AC/DC Push-in terminals 3-30 V, 6-60 V, 30-300 V, 60-600 V 1SVR740830R0300
110-130 V AC 1SVR740831R0300
220-240 V AC 1SVR740831R1300
CM-ESS.1S 24-240 V AC/DC Screw type terminals 3-30 V, 6-60 V, 30-300 V, 60-600 V 1SVR730830R0300
110-130 V AC 1SVR730831R0300
220-240 V AC 1SVR730831R1300
Accessories
Type Description Order code
ADP.01 Adapter for screw mounting 1SVR430029R0100
MAR.12 Marker label for devices with DIP switches 1SVR730006R0000
COV.11 Sealable transparent cover 1SVR730005R0100
Connection technology
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Maintenance free Easy Connect Technology with push-in terminals |
Approved screw connection technology with double-chamber cage connecting terminals |
Type designation CM-xxS.yyP Type designation CM-xxS.yyS
Push-in terminals Double-chamber cage connecting terminals
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– Tool-free connection of rigid and flexible wires with wire end ferrule – Easy connection of flexible wires without wire end |
– Terminal spaces for different wire sizes – One screw for opening and closing of both cages – Pozidrive screws for pan- or crosshead screwdrivers |
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ferrule by opening the terminals – No retightening necessary |
according to DIN ISO 2380-1 Form A 0.8 x 4 mm (0.0315 x 0.157 in), DIN ISO 8764-1 PZ1 ø 4.5 mm |
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– One operation lever for opening both connecting terminals |
(0.177 in) |
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– For triggering the lever and disconnecting of wires you can use the same tool (Screwdriver according to DIN ISO 2380-1 Form A 0.8 x 4 mm (0.0315 x 0.157 in), DIN ISO 8764-1 PZ1 ø 4.5 mm (0.177 in))– Constant spring force on terminal point independent of the applied wire type, wire size or ambient conditions (e. g. vibrations or temperature changes)– Opening for testing the electrical contacting– Gas-tight
Both the Easy Connect Technology with push-in terminals and screw connection technology with double-chamber cageconnecting terminals have the same connection geometry as well as terminal position.
2 – Voltage monitoring relays CM-ESS.1 | Data sheet
Functions
Operating controls
1 Adjustment of the hysteresis
2 Adjustment of the threshold value
3 Indication of operational states
U/T: green LED – control supply voltage
R: yellow LED – relay status
U: red LED – over- / undervoltage
1
4 Adjustment of the measuring range2
5 DIP switches (see DIP switch functions)
3
4
5
Application
The voltage monitoring relays CM-ESS.1 are designed for use in single-phase AC and/or DC systems for over- orundervoltage monitoring as well as detection of phase loss. The devices are available with different supply voltage rangesand work according to the open-circuit principle.
Operating mode
The CM-ESS.1 have 1 c/o (SPDT) contact and include 4 measuring ranges: 3-30 V, 6-60 V, 30-300 V and 60-600 V.
The units are adjusted with front-face operating controls. The selection of over- d or undervoltage monitoring c ismade with a DIP switch. Potentiometers, with direct reading scale, allow the adjustment of the threshold value U and of thehysteresis %. The hysteresis % is adjustable within a range of 3 to 30 % of the threshold value.
Data sheet | Voltage monitoring relays CM-ESS.1 – 3
Function diagrams
Overvoltage monitoring d
The voltage to be monitored (measured value) is applied to terminals B-C. The control supply voltage applied to terminalsA1-A2 is displayed by the glowing green LED.
If the measured value exceeds the adjusted threshold value, the output relay energizes and the red LED (overvoltage) andthe yellow LED (relay energized) glow.
If the measured value drops below the threshold value minus the adjusted hysteresis, the output relay de-energizes and thered and yellow LEDs turn off.
A1-A2
Threshold
Hysteresis
Measured value
11-14 (15-18)11-12 (15-16)
green LED
red LED
yellow LED
Undervoltage monitoring c
The voltage to be monitored (measured value) is applied to terminals B-C. The control supply voltage applied to terminalsA1-A2 is displayed by the glowing green LED.
If the measured value drops below the adjusted threshold value, the output relay energizes, the red LED flashes W (undervoltage) and the yellow LED (relay energized) glows.
If the measured value exceeds the threshold value plus the adjusted hysteresis, the output relay de-energizes and the redand yellow LEDs turn off.
A1-A2
Measured value
Hysteresis
Threshold
11-14 (15-18)11-12 (15-16)
green LED
red LED
yellow LED
4 – Voltage monitoring relays CM-ESS.1 | Data sheet
Electrical connection
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A1 1115 B |
C |
A1-A2 Rated control supply voltage B-C Measuring ranges: 3-30 V, 6-60 V, 30-300 V, 60-600 V |
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B 1115 |
1115-1216/1418 Output contact – open-circuit principle |
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C
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A1 A2 1216 1418 |
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1418 1216 A2 |
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Connection diagram
DIP switches
1 ON Undervoltage monitoring OFF Overvoltage monitoring
OFF = Default
Data sheet | Voltage monitoring relays CM-ESS.1 – 5
2CDC112171D0201