ABB 1SVR730841R0400 Current Monitoring Relay - UL/CSA
Part Number: 1SVR730841R0400
Quick Summary
The CM-SRS.21S current monitoring relay provides single‑phase current monitoring for control panels. Engineers often confront nuisance trips caused by minor current fluctuations and varying loads. This ABB device offers CE, UL/CSA and UKCA certifications along with IP50 protection, ensuring safe, reliable operation in harsh industrial environments. Designed for easy DIN rail mounting and screw-terminal wiring, it supports three measuring ranges and adjustable hysteresis and trip delay, enabling precise threshold control without sacrificing availability. By delivering predictable responses to over- or undercurrent events, it helps maintain machine uptime while simplifying compliance and serviceability in modern automation systems.
Product Information
Extended Description
1SVR730841R0400 ABB: The CM-SRS.21S is a single-functional current monitoring relay from the CM single-phase monitors range. This monitoring relay operates with a rated control supply voltage of 110 - 130 V AC and has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A. It provides a RMS measuring principle for DC and AC currents with 3 measuring ranges: 3-30 mA, 10-100 mA and 0.1-1 A and works according to the open-circuit principle. The CM-SRS.21S is configurable for over- or undercurrent monitoring. The hysteresis is adjustable within a range of 3 to 30 % of the threshold value and the tripping delay is adjustable over a range of instantaneous to 30 s (0, 0.1-30 s). A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers screw connection technology with double-chamber cage connection terminals.
EAN
4016779852302
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-SRS.2P; CM-SRS.2S Current monitoring relays, single-phase AC/DC
Instructions and Manuals
Instruction Sheet / Manual - CM-SxS Single-phase current monitoring relays | Installation instructions - CM-SxS Single-phase current monitoring relays
CAD Dimensional Drawing
Information - 2D and 3D files for CAD systems
Product Net Width
22.5 mm
Product Net Height
85.6 mm
Product Net Depth / Length
103.7 mm
Product Net Weight
0.179 kg
Function
Over- or undercurrent monitoring
Measuring Range
3 ... 30 mA | 10 ... 100 mA | 0.1 ... 1 A
Time Range
0 s or 0.1 ... 30 s tripping delay (ON)
Rated Control Supply Voltage (Us)
110 ... 130 V AC
Output
2 c/o (SPDT) contacts
Terminal Type
Screw Terminals
Rated Operational Current AC-12 (Ie)
(230 V) 4 A
Rated Operational Current AC-15 (Ie)
(230 V) 3 A
Rated Operational Current DC-12 (Ie)
(24 V) 4 A
Rated Operational Current DC-13 (Ie)
(24 V) 2 A
Minimum Switching Capacity
24 V | 10 mA
Rated Impulse Withstand Voltage (Uimp)
Measuring Circuit / Output Circuit 6 kV | Output Circuit 1 / Output Circuit 2 4 kV | Supply Circuit / Measuring Circuit 6 kV | Supply Circuit / Output Circuit 4 kV
Rated Insulation Voltage (Ui)
Measuring Circuit / Output Circuit 600 V | Output Circuit 1 / Output Circuit 2 250 V | Supply Circuit / Measuring Circuit 600 V | Supply Circuit / Output Circuit 250 V
Degree of Protection
Housing IP50 | Terminals IP20
Overvoltage Category
III
Pollution Degree
3
Short-Circuit Protective Devices
Output Circuit NC - F Type Fuses 10 A | Output Circuit NO - F Type Fuses 10 A
Electrical Durability
AC-12 100000 cycle
Mechanical Durability
Nr. Operations 30000000 cycle
Connecting Capacity
Flexible with Ferrule 1x 0.5 ... 2.5 mm² | Flexible with Ferrule 2x 0.5 ... 1.5 mm² | Flexible with Insulated Ferrule 1x 0.5 ... 2.5 mm² | Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mm² | Flexible 1x 0.5 ... 2.5 mm² | Flexible 2x 0.5 ... 1.5 mm² | Rigid 1x 0.5 ... 4 mm² | Rigid 2x 0.5 ... 2.5 mm²
Tightening Torque
0.6 ... 0.8 N·m
Wire Stripping Length
8 mm
Recommended Screw Driver
0.8 x 4 | 4.5 | Pozidriv 1
Mounting Position
1 ... 6
Mounting on DIN Rail
TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 | TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715
Standards
CAN/CSA C22.2 No.14 | IEC/EN 63000 | IEC/EN 60255-27 | IEC/EN 61000-6-2 | IEC/EN 61000-6-3 | UL 508
Maximum Operating Voltage UL/CSA
Output Circuit 300 V AC
Contact Rating UL/CSA
B300
Connecting Capacity UL/CSA
Flexible 1x 18-14 AWG | Flexible 2x 18-16 AWG | Rigid 1x 20-12 AWG | Rigid 2x 20-14 AWG
Tightening Torque UL/CSA
7.08 in·lb
Pilot Duty UL/CSA
B300
Flammability According to UL94
V-0
Ambient Air Temperature
Operation -20 ... +60 °C | Storage -40 ... +85 °C
Maximum Operating Altitude Permissible
Without Derating 2000 m
Conflict Minerals Reporting Template (CMRT)
CMRT - Conflict Minerals Reporting Template
REACH Declaration
REACh Info for Electronic Relays and Controls
RoHS Information
RoHS Declaration of conformity for Electronic Relays and Controls
RoHS Status
Following EU Directive 2011/65/EU and Amendment 2015/863 July 22, 2019
Toxic Substances Control Act - TSCA
Toxic Substances Control Act (TSCA) declaration for Electronic Relays and Controls
CB Certificate
CB_DK-28255-UL
CQC Certificate
CQC Certificate, Relays, CM-SRS.., CM-SFS.., CM-ESS..,CM-EFS.., CM-TCS.., Made in Germany
cULus Certificate
cULus508_20120203-E140448
Declaration of Conformity - CCC
CCC Certificate, Relays, CM-SRS.., CM-SFS.., CM-ESS..,CM-EFS.., CM-TCS.., Made in Germany
Declaration of Conformity - CE
EU Declaration of Conformity - CM-ExS.xxx, CM-SxS.xxx Single-phase current and voltage monitoring relays
Declaration of Conformity - UKCA
UK Declaration of Conformity - CM-ExS.xxx, CM-SxS.xxx Single-phase current and voltage monitoring relays
DNV GL Certificate
DNV Certificate - Current monitoring relays CM-SFS.x and CM-SRS.x with screw or push-in terminals
EAC Certificate
EAC Certificate - Measuring and monitoring relays CM-xxS.xxx and CM-xxN.xxx range in the new housing
Package Level 1 Units
box 1 piece
Package Level 1 Width
97 mm
Package Level 1 Depth / Length
30 mm
Package Level 1 Height
109 mm
Package Level 1 Gross Weight
0.201 kg
Package Level 1 EAN
4016779852302
Object Classification Code
B
ETIM 7
EC001440 - Current monitoring relay
ETIM 8
EC001440 - Current monitoring relay
ETIM 9
EC001440 - Current monitoring relay
eClass
V11.0 : 27371802
UNSPSC
39122332
E-Number (Finland)
2712313
E-Number (Norway)
4188060
E-Number (Sweden)
3860633
Feature 1: Two c/o (SPDT) outputs enable independent alarm and control circuits. Business impact: allows precise fault signaling and safe interlock integration, reducing risk in automated lines. Application: machine protection in packaging and process lines where separate signaling and control paths are required. Feature 2: Three measuring ranges (3-30 mA, 10-100 mA, 0.1-1 A) provide a wide current window with a single device. Business impact: lowers parts count and accelerates commissioning while accommodating varying loads. Application: new installations and retrofit projects in panelboards and motor control centers. Feature 3: Rated control supply of 110-130 V AC ensures direct compatibility with standard control circuits. Business impact: simplifies wiring, reduces interface adapters, and shortens time to first run. Application: mainstream 230 V systems in factory automation. Feature 4: Open‑circuit measuring principle improves reliability by avoiding drift from secondary faults. Business impact: fewer false trips and stable protection in noisy electrical environments. Application: critical process lines with fluctuating currents. Feature 5: Adjustable hysteresis (3–30%) and tripping delay (0 s or 0.1–30 s) provide tuned protection, balancing sensitivity and immunity. Business impact: minimizes downtime and maintenance visits. Application: precision monitoring in conveyors and presses. Feature 6: Rugged DIN rail mounting with screw terminals and IP50 housing supports quick installation and robust field performance. Business impact: faster deployments and durable operation in control cabinets. Application: OEM panels and retrofit projects requiring durable, compliant relays. Feature 7: Certifications and standards including CE, UL/CSA and UKCA, along with RoHS/REACH compliance, streamline regulatory approvals. Business impact: reduces certification cycles for new equipment. Application: global manufacturing environments with strict compliance needs.
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FAQs
Mount the unit on a standard TH35 DIN rail (TH35-15 or TH35-7.5) and use the screw terminals for input, output and supply connections. The device uses 2 SPDT contacts for signaling and control; tighten terminals to 0.6-0.8 N·m and strip wires 8 mm. Observe the 110-130 V AC control supply and ensure correct polarity and safety isolation. This approach minimizes wiring errors and speeds up commissioning in panel builds.
It monitors 3-30 mA, 10-100 mA, and 0.1-1 A. Choose the range based on your load current profile: small loads require the 3-30 mA range for sensitivity, while higher current circuits should use the 0.1-1 A range to avoid saturation and nuisance tripping. The open‑circuit principle helps maintain stability across range transitions during startup or transient events.
The device supports robust control and protection functions in line with IEC/EN 60255 and UL 508 family standards, with CE, UL/CSA and UKCA certifications and RoHS/REACH compliance. While it provides current monitoring and alarming capabilities, evaluate your safety strategy to determine if an integrated safety relay or additional interlock is required for your application.
Key certifications include CE, UL/CSA, UKCA, CCC, CB, and EAC. It also conforms to RoHS and REACH requirements, with IP50 enclosure protection and an IP20 rated terminal area. These certifications support global deployments and simplify regulatory approvals for panel builders and system integrators.
The device offers adjustable hysteresis from 3 to 30 percent of the threshold value and a selectable tripping delay of 0 seconds or 0.1 to 30 seconds. This combination reduces nuisance trips during transient events while ensuring timely isolation during genuine faults, improving overall machine uptime and process continuity.