The ABB CT-ERS. (SVRR) is a single-function ON-delay electronic timer relay featuring two changeover (SPDT) contacts and a universal control supply voltage of – V AC/DC. This timer offers selectable time ranges from . seconds to hours, making it highly versatile for industrial automation and control applications. The time range is easily set via a rotary switch, with fine adjustment provided by a front-face potentiometer. The relay is housed in a compact . mm DIN rail mount enclosure and is available with either screw or push-in terminals. Status LEDs indicate supply voltage and relay output status for quick diagnostics. The CT-ERS. is designed for robust operation, featuring high mechanical durability and compliance with international standards.

Key Features:

• Function: ON-delay (delay on make)

• Time ranges: selectable, from . s to h

• Contacts: SPDT (changeover), rated V / A

• Control supply voltage: – V AC/DC (/ Hz)

• Precise time adjustment: Rotary switch and potentiometer

• Status indication: Green LED (supply/timing), yellow LED (relay status)

• Mounting: DIN rail, . mm width

• Terminals: Screw or push-in (Easy Connect)

• Mechanical life: million operations

• Electrical life: , cycles at V, A (AC-)

• Operating temperature: –°C to +°C

• Housing: UL V- flame retardant

• Protection: IP (housing), IP (terminals)

• Standards: IEC/EN -, UL , CE

ABB – CT-ERS.21 (1SVR630100R0300) – ON-Delay Timer Relay, 2 SPDT, 24–240V AC/DC