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About Safety Relays and Control Modules
Safety relays and control modules differ from conventional relays in that they have force-guided (positive-driven) contacts. Three relays are used in a safety relay module. One relay checks the condition of the other two and signals a failure. In addition, safety relays and control modules may be configured as either a single channel or dual channel. Single channel safety relays are capable of accepting only one normally closed (NC) input. When used in safety circuits, they are unable to detect a short circuit failure or a failure of the monitored input to change state. Dual channel safety relays ensure safety system integrity even if one logic circuit fails.
Important output parameters to consider when specifying safety relays and control modules include maximum current rating, maximum AC voltage rating, maximum DC voltage rating, maximum AC power rating and maximum DC power rating. The current rating is the maximum switching current rating for the relay or module. The AC voltage rating is the rated AC voltage for the module. The DC voltage rating is the maximum DC voltage switching rating for the relay / module. The AC power rating is the maximum power rating of the switched line. The DC power rating is the maximum power rating for switched DC voltage. Safety relays and control modules with other output parameters are also available.
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Part Numbers for Safety Relays and Control Modules
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| 462151E1 | elobau sensor technology, Inc. | Safety Relays and Control Modules | Designed for a maximum of four sensors | |
| 462121H5U | elobau sensor technology, Inc. | Safety Relays and Control Modules | A maximum of 32 sensors may be used with an interconnection system | |
| 470221E1U | elobau sensor technology, Inc. | Safety Relays and Control Modules | Max of 8 sensors & 8 emergency stop buttons with an interconnection system | |
| 462124G1U | elobau sensor technology, Inc. | Safety Relays and Control Modules | A maximum of 32 sensors may be used with an interconnection system |
