If you need to switch something on or off some time after actually deactivating it, the use of a timer relay is a good choice. Timer relays are mounted on DIN rails. By connecting several timer relays in series it is possible to set up a switching sequence. The time range of Schrack Technik timer relays can be set between a few milliseconds and 100 hours. Timer must always be set in the de-energised state. There is a wide variety of timer relays available; for every application the suitable relay:
Measuring and Monitoring Relays
The voltage, current, phase, level and thermistor monitoring relays are available in industrial type or DIN rail design.
Single Function Timer Relays
The classic delayed-on or delayed-off function is best realised with a monofunction timer relay from Schrack Technik. The Series 5 rail mounting relay operates with 1 CO, a voltage range from 24-240 V AC or V DC and is 17.5 mm wide.
Schrack Technik Timer Relays
Tripping delay: 1 function, 1 CO ZR5E0011
Release delay: 1 function, 1 CO ZR5R0011
Dual Function Timer Relays
On the bigger model of the rail-mounted timer relays a tripping delay and a release delay can be set at the same time. The Series 5 dual function timer relay from Schrack Technik has 1 CO, a component width of 17.5 mm, and operates in the multi-voltage range from 24-240 V AC/DC.
Schrack Technik Timer Relays: 2 functions, 1 CO ZR5ER011
Multi-Function Timer Relays
With its 7 functions the multi-function timer relay is a true multi-talent among the Schrack Technik timer relays. The DIN rail mounted Series 6 relay is available with either 1 or 2 COs and support a multi-voltage range from 12-240 V AC/DC.
You can set the following 7 functions on the multi-function timer relay from Schrack Technik:
· Tripping delay
· Release delay with control input
· Leading edge impulse with control input
· Trailing edge impulse with control input
· Tripping delay with control input
· Leading edge impulse, voltage controlled
· Flasher pause first
In addition to these 7 functions the multi-function timer relays from Schrack Technik offer 7 time ranges with durations between 50 ms and 100 h.
Schrack Technik Timer Relays
Multiple functions, 1 CO ZR5MF011
Multiple functions, 2 COs ZR5MF025
Plug-In Multi-Function Timer Relays
They include 2 COs and can be plugged into the Schrack Technik 11 pole MT socket. The component width is 38 mm with a 45 mm standard front dimension
Multiple functions, plug-in design, 2 COs ZR4MF025-A
A timer relay is used to set the frequency of the flasher unit. The following relays of this type are available:
Single Function Relays
On the single function relays the flasher can be set asymmetrically. The Series 5 DIN rail mounted relay comprises 1 CO and has a component width of 17.5 mm.
Timer relay, flasher asymmetric, 1CO ZR5B0011
Dual Time Multi-Function Relays
This type of DIN rail mounted relay includes a timer and provides a dual time multi-functionality with 7 time ranges available. The dual time multi-function relay from Schrack Technik comprises 2 COs and has a component width of 35mm.
The dual time multi-function relay from Schrack Technik offers the following functions:
Dual time flasher relay, 2 COs ZR5B0025
Plug-in dual time multi-function relay for 11 pole MT socket (YMR78700)
Dual time flasher relay, plug-in design, ZR4B0025-A
Multi-function timer relay, Series 6, ZR6MF052
- 16 functions
- 16 time ranges
The star-delta relay from Schrack Technik has 2 COs and one star-delta starting.
Series 5 is in DIN rail mount design with a component width of 35 mm and a wide input voltage range. ZR6MF052
Series 6 is in industrial type design with a component width of 22.5 mm. ZR6SD052
Emergency Lighting Testers
An emergency lighting tester's timer function ist used to test emergency lighting, hence the name. This type of timer relay includes a test switch, 1 CO and has a component width of 17.5 mm. ZR5RT011