The safety system must be wired in accordance with EN60204-1. This section gives a description of the rules for wiring and mechanically protecting cables.
The entire safety system, the SS ESDs or PSs, TSX PAY 262 modules, protection fuses and auxiliary relays are incorporated in housings with an IP54 minimum protection index as per IEC 60529.
The module has no grounding terminal on its front panel. Depending on the TSX CPP •02 cable being used, the 0 VDC can be grounded (see EN60204-1) directly via the TELEFAST ABE-CPA13.
NOTE: The TSX CPP 301 cable has no ground connection.
Protection of safety system
Errors within the safety modules can be propagated to the outside of the module, particularly to the external supply in use: short circuits within the module can cause a supply voltage avalanche or a supply malfunction if it is not protected. For this, a 1 A (gL) quick-blow fuse is placed in the control section of the relays, given that maximum consumption is 200 mA.
NOTE: this fuse, called F1, is an active element of the safety system.
The module also contains a current limiting device set to 750 mA in order to detect inter-channel short circuits on the SS ESDs or PSs. The external supply is protected in the event of this happening, and an error is indicated on the safety system.
To guarantee the safety function, it is compulsory to use the following:
Protection of safety outputs
Output voltages can reach 240 Vac or 125 Vdc.
Outputs are not protected inside the module, though GMOV-type (for a continual load), or RC cell-type (for an alternating load) protection is applied directly to the terminals of the load in use. These protective measures must be adapted to the load.
The use of guided-contact auxiliary relays and the feedback loop wiring then make it possible to detect a safety output short circuit.
A 4 A (gL) quick-blow fuse is located in the auxiliary supply circuit to protect the module’s safety relay contacts and the connected loads: this fuse is identical to that used in PREVENTA modules.
The fuse F2, located on the safety outputs, provides protection against short circuits and overloads. This protection avoids the melting of the safety relay contacts in TSX PAY 262 modules.
