Product Code: CT-ERS.21S

The CT-ERS.21S is a single-function electronic time relay from the CT-S timer range. It provides an ON-delay (delay on make) function with 10 time ranges from 0.05 s to 300 h. This time relay operates with a rated control supply voltage of 24 - 240V AC/DC and has a 2 C/O (SPDT) output with contacts rated at 250V/4A. 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.

Rated Operational Current AC-12 230V (A)	4
Rated Operational Current AC-15 230V (A)	3
Rated Operational Current DC-12 24V (A)	4
Rated Operational Current DC-13 24V (A)	2
Brand	ABB
Connecting Capacity	Flexible with Ferrule 1 x 0.5 - 2.5mm² Flexible with Ferrule 2 x 0.5 - 1.5mm² Flexible with Insulated Ferrule 1 x 0.5 - 2.5mm² Flexible with Insulated Ferrule 2 x 0.5 - 1.5mm² Flexible 1 x 0.5 - 2.5mm² Flexible 2 x 0.5 - 1.5mm² Rigid 1 x 0.5 - 4mm² Rigid 2 x 0.5 - 2.5mm²
Recommended Screwdriver	0.8 x 4, 4.5, Pozidriv 1
Ambient Temperature Range (°C)	-40 to 60
Degree of Protection	Housing: IP50, Terminals: IP20
Dimensions (mm)	22.5W x 85.6H x 103.7D
Outputs	2 x Change-over (SPDT) Contacts
Overvoltage Category	III
Pollution Degree	3
Rated Control Supply Voltage AC/DC (V)	24 - 240
Rated Frequency (Hz)	50/60
Rated Impulse Withstand Voltage (kV)	Input Circuit: 4kV
Rated Insulation Voltage (V)	Input/Output Circuit: 500V, Output Circuit 1/2: 300V
Rated Operational Voltage (V)	Auxiliary Circuit: 250V
Relay Type	ON-Delay
Standards and Approvals	IEC/EN 63000, IEC/EN 61812-1, UL 508
Storage Temperature Range (°C)	-40 to 85
Terminal Type	Screw
Tightening Torque (Nm)	0.6 - 0.8
Time Ranges	0.05s - 300h
Weight (kg)	0.13
Wire Stripping Length (mm)	8

Electrical Time Switches, Timers & Control Relays

ABB TIMER ON-DELAY 2C/O CT-ERS.21S

Product Code: CT-ERS.21S

Technical Specifications

Documents

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