Key Features
Timer Function: OFF‑delay (delay on break) — output remains energized for a set period after the control input is removed.
Adjustable Time Ranges: Selectable timing from 0.05 seconds up to 300 hours, allowing flexible configuration for many applications.
Output Contacts: Two changeover (SPDT) contacts — can switch two circuits or provide both NO and NC outputs.
DIN‑Rail Mounting: Compact housing that clips onto standard TH35 DIN rails for easy panel installation.
Status Indication: LED indicators show timing and output status.
Screw Terminals: Secure screw‑type connections for reliable wiring.
Electrical Ratings
Control Supply Voltage: Wide range 24–48 V DC or 24–240 V AC, suitable for many control applications.
Output Contacts Rating:
Rated for up to 250 V AC switching.
Typical current capacity around 3–4 A depending on AC/DC load.
Contact Configuration: 2 SPDT (changeover) output contacts.
Minimum Switching Capacity: Down to small signal levels (low‑voltage control).
Mechanical & Environmental
Mounting: Snap‑on DIN‑rail TH35 installation.
Housing Width: Compact 22.5 mm, ideal for space‑efficient panels.
Operating Temperature: Designed for typical industrial ambient temperatures.
Storage Temperature: Broad range for shipping and storage conditions.
Terminal Protection: Terminals protected within enclosure when mounted correctly.
Physical Dimensions
Width: Approx. 22.5 mm
Height: Approx. 85–86 mm
Depth: Approx. 103–104 mm
Weight: Roughly 0.14 kg
Typical Applications
Control sequence timing in machines where delay after signal removal is needed.
Safety or shutdown interlocks that require a controlled delay before de‑energizing circuits.
Automation logic in panel boards, PLC interfaces, and relay logic systems.
The ABB CT‑APS.22S is a DIN‑rail mountable electronic timer relay designed for industrial control systems and automation applications. It provides a reliable OFF‑delay timing function, meaning the timer starts its delay period after the control input is removed. The compact module is part of ABB’s CT‑S family of time relays, offering adjustable time ranges and dependable performance in control panels and machinery logic circuits.