Connection of Safety Devices

1. Single Channel, 1 NO from +24V

3. Dual Channel, 1 NO, 1 NC from +24V

5. Safety Mat or Contact Strip

The input (contact to S14) must be closed before the outputs can be activated. When the input contact is opened the relay safety output contacts open.

One input contact must be closed(S14) and one opened (S44) before the relay outputs can be activated. The safety relay contacts will open if one or both of the inputs change status or in case of a short-circuit between S14 and S44. Both inputs must return to their initial positions before the relay outputs can be reactivated.

Both 'contact' inputs from a inactivated safety mat/contact strip must be made in order to allow the RT6 relay outputs to be activated. When the safety mat/contact strip is activated or a short-circuit is detected across S14-S23, the relay will de-energize (safety outputs open) and the 'ON' LED will flash. As output S13 has an internal current limit of 80 mA, the RT6 will not be overloaded when the mat/contact strip is activated or a short circuit is detected.

2. Dual Channel, 2 NO from +24V

4. Dual Channel, 1 NO from +24V, 1 NO to 0V

Both input contacts (S14 and S34) must be closed before the relay outputs can be activated. The safety relay contacts will open if one or both of the input contacts are opened. Both the input contacts must be opened and reclosed before the relay can be reset. A short-circuit between inputs S14 and S34 can only be supervised if the device connected to the inputs has short-circuit supervised outputs, e.g. JOKAB JSC light curtains.

Relay functions as option 2, but a short-circuit, in this case between inputs S14 and S24, is supervised (safety outputs are opened).

Reset Connections

Manual Supervised Reset

Automatic Reset

Testing External Contactor Status

The manual supervised reset contact connected to input X1 must be closed and opened in order to activate the relay outputs.

Automatic reset is selected when S53, X1 and X4 are linked. The relay outputs are then activated at the same time as the inputs.

*connected to S13 for safety mat/contact strip

Contactors, relays and valves can be supervised by connecting 'test' contacts between S53 and X1. Both manual supervised and automatic reset can be used.

Output Connections

Relay Outputs

Transistor Outputs

The RT6 has three (3 NO) safety outputs and 1 NC information output.

In order to protect the output contacts it is recommended that loads (inductive) are suppressed by fitting correctly chosen VDR's, diodes etc.

Diodes are the best arc suppressors, but will increase the switch off time of the load.

The RT6 has two (2) voltage free transistor outputs for information.

The transistor outputs are supplied with voltage to Y13, either from S53 (+24V) or an external 5-30 VDC. Y14 and Y24 follow the relay inputs and outputs as follows:

• Y14 becomes conductive when the relay input conditions are fulfilled.
• Y24 becomes conductive when both the output relays are activated.

***Note: These outputs are only for information purposes and must not be connected to the safety circuits of the machinery.