Sensys Corporation

Unit Features 
1) Positive-guided relay outputs:
– 3 safety contacts (N/O), instantaneous
– 1 auxiliary contact (N/C), instantaneous 

 Safe separation of safety contacts 13-14, 
23-24, 33-34 from input circuits A1-A2,  feedback loop Y1-Y2 and auxiliary contact 41-42. 
 
Connection options for:
– E-STOP pushbutton – Reset button ` LED indicator for: – Switch status channel 1/2 – Supply voltage 

Safety features

The relay meets the following safety requirements: 
1) The circuit is redundant with built-in self-monitoring. 
2) The safety function remains effective in the case of a component failure. 
3) The correct opening and closing of the safety function relays is tested automatically in each on-off cycle. 

Unit description

The safety relay meets the requirements of EN 60204-1 and IEC 60204- 1 and may be used in applications with  

 E-STOP pushbuttons

The safety relay is not suitable for noncontact barriers because

A dynamic start is not possible

The unit can be started during the delay-on de-energisation time 

Function description

 Single-channel operation: No redundancy in the input circuit, earth faults in the reset circuit are detected. 

 Automatic start: Unit is active once the input circuit has been closed.

 Manual reset: Unit is active once the input circuit is closed and then the reset circuit is closed.  

 

 Increase in the number of available contacts by connecting contact expander modules or external contactors/relays. 

Wiring Please note:  Information given in the “Technical details” must be followed.

 Outputs 13-14, 23-24, 33-34 are safety contacts, output 41-42 is an auxiliary contact (e.g. for display).

 To prevent contact welding, a fuse should be connected before the output contacts (see technical details).  

Calculation of the max. cable runs l max in the input circuit: Rlmax = max. overall cable resistance (see technical details) Rl /km = cable resistance/km  

 

Use copper wire that can withstand 60/75 °C. ` Sufficient fuse protection must be provided on all output contacts with capacitive and inductive loads. 

Key

Power: Supply voltage

 Reset/start: Reset circuit Y1-Y2

 Input: Input circuits A1-L+

Output safe: Safety contacts 13-14, 23-24, 33-34

Output aux: Auxiliary contacts 41- 42

A: Automatic reset ` d: Manual reset

B: Input circuit closes before reset circuit

C: Reset circuit closes before input circuit

T1: Switch-on delay

 T2: Delay-on de-energisation 

Installation

 The safety relay should be installed in a control cabinet with a protection type of at least IP54.

 Use the notch on the rear of the unit to attach it to a DIN rail.

 

 Ensure the unit is mounted securely on a vertical DIN rail (35 mm) by using a fixing element (e.g. retaining bracket or an end angle).