Digital cyclic timer for DIN-rail TDT4-2L/220V
T=(0.1sec ... 9999min), Us=220Vac, Output 4A/220V, 86x70x58mm
The TDT4-2L/220V digital cyclic timer for DIN-rail mounting is a microprocessor device. Three main parameters are set: "Ton" - the time of ON-state of the output relay; "Toff" - the time of OFF-state of the output relay; "C" - number of cycles. The cyclic timer can be started in three ways: a) by turning on the supply voltage; b) by pressing a button of the front panel of the counter; c) by using an external button or sensor connected to the timer. The time-relay has an energy-independent. Programmatically can be set other parameters defining the operation of the timer.
FEATURES
The TDT4-2L digital cyclic timer is designed for mounting on an M35 DIN-rail. It is a compact device based on a microprocessor. It serves to commutate direct current and alternating current electric circuits. The time of the on state "Ton" and the time of the off state "Toff" of the output relay are programmatically set in digital form. One cycle is equal to the sum of the times "Ton" and "Toff". It is possible to set arbitrary number of cycles "C", after counting of which the timer turns off and goes to the starting position. It is used widely in automation of production, technological and other processes.
TECHNICAL PARAMETERS
Digital indication, LED - red | 4 digits, h = 14mm (height) |
Time range, Ton ( Toff ) | 0,1 sec … 9999 min |
Number of cycles, C | 0 ... 999 |
Supply voltage, Us | 220 VAC ±10% |
Power consumption, P | 4 W (16 mA) |
Output - Relay (NO+NC) | 4A / 220VAC |
Error counting time | ±0,05 % |
Operating temperature, Tamb | -20º...+50º C |
Degree of protection | IP40 |
Joining | Terminal block |
Overall dimensions | 86x70x58 mm, DIN35-70 |
Programmable parameters
Range of parameter Ton : | |
0,1÷999,9 sec | 0.1'' |
1 ÷ 9999 sec | 1.0'' |
1 ÷ 9999 min | 1.0’ |
Parameter Ton (time of switched on state the output relay) | 0.1.÷ 999.9. (1. ÷ 9999.) |
Range of parameter Toff : | |
0,1÷999,9 sec | 0.1'' |
1 ÷ 9999 sec | 1.0'' |
1 ÷ 9999 min | 1.0' |
Parameter Toff (time of out-of-work state the output relay) | 0.1 ÷ 999.9 (1 ÷ 9999) |
Number of cycles C (0 - infinity) | 0 ... 999 |
Interruption of the supply voltage Us : | |
- after an interruption, the reading continues from the current data | Cont |
- after an interruption, the reading automatically starts from the beginning | Full |
- after an interruption, a stop mode of the current data is established | Ucc |
- after an interruption, the timer is reset | Goto |
Automatic start when the power is turned on for the first time | no / Auto |
Initial starting of the timer, St ( Ton / Toff ) | ⌈‾⌉ / ⌉_⌈ |
Timing diagram of the TDT4-2L timer

Timing diagram of the output relay (“NO” - normally open contact)
Schemes of connection

Fig.1
Starting the timer with NPN sensor

Fig.2
Starting the timer with switch K2
Overall dimensions (mm)

Short description
The TDT4-2L digital cyclic time relay is an electronic device used as a means of automating production processes. Used for switching direct current and alternating current electrical circuits.
Documentation
Typical parameters of TDT4-2L timer
TYPE | SUPPLY VOLTAGE | CONSUMPTION |
---|---|---|
TDT4-2L / 12-24V | 11÷31VDC / 11÷27VAC | 2W (85mA) |
TDT4-2L / 220V | 220VAC ±10% | 4W (16mA) |