Overview
LZS coupling relays with plug-in relays can be ordered as complete units or as individual modules for customer assembly.
Function
The coupling relays with semiconductor output have low power consumption and are therefore particularly well-suited to solid-state systems. In the versions equipped with LEDs, these indicate the switching state. The LZS:PT coupling relays have a test button. This can be used to force the relays into the switching state and to lock it without electrical control. This is indicated by a raised petrol-colored lever.
Control with solid-state output
In the case of solid-state outputs (e.g.Ā proximity switch) with overload and short-circuit protection, you must make allowance during configuration for the temporarily flowing capacitor charging currents! This is possible, for example, by using a suitable LZS coupling relay with plug-in relay.
Surge suppression
The 24Ā VĀ DC relays LZX:RT and LZX:PT with LEDs can be supplied with, all others without integral surge suppression (freewheeling diode connected in parallel with A1/A2). The positive control supply voltage must be connected to coil terminal A1.
Mounting
The relays are plugged into the base and this is snapped onto a THĀ 35 DIN rail according to IEC 60715.
For the RT and PTĀ series, a combined fixing and ejection bracket is available which can be used to disassemble the relay where access is difficult, for example, when relays are mounted side-by-side.
They can be mounted as required.
Logical separation
The terminals for the contacts and the terminals for the coil are arranged on separate levels, e.g. above for contacts and below for coil. Logical separation is not necessarily protective separation.
Protective separation
For protective separation, transfer of the voltage from one circuit to another circuit is prevented to a suitable degree of safety (requirements and tests are described in IECĀ 60947ā1 in AnnexĀ N).














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