The TM172E28R is a digital, multi-function timer relay from Schneider Electric's Harmony control relay series. It is a DIN rail mounted device designed for precise time-delay control in industrial and building automation applications.
Specifications:
Parameter Specification
Product Range Harmony Control Relays (TM172 Series)
Device Type Multi-Function Digital Timer Relay
Power Supply Voltage 100-240V AC, 50/60 Hz (Typical for "E" series). Must verify exact voltage from datasheet.
Power Consumption Approx. 3 VA
Timing Functions Configurable via switches (On-delay, Off-delay, Interval, Pulse, etc.)
Timing Ranges Selectable ranges (e.g., 0.1s–10h, 1s–100h)
Timing Accuracy ±0.5% of set value ± 20 ms
Number of Outputs 2 Changeover Contacts (DPDT)
• Output 1: Timed Contact
• Output 2: Instantaneous Contact
Output Rating 8 A @ 250V AC (Resistive)
5 A @ 250V AC (Inductive)
8 A @ 30V DC (Resistive)
Setting Method Switches (function) + rotary potentiometer or thumbwheel (time)
Mounting DIN Rail (35mm)
Operating Temperature -20°C to +55°C
Standards & Approvals UL 508, CSA, IEC/EN 61812-1, CE, RoHS