رله حفاظتی تک کانال جی ام اینترنشنال D5091S GMI SIL3 ND Loads

 رله ایمنی مدل D5091S برای کاربردهای ND (Normally De Energized)

رله خروجی تک کاناله

General Description:
The single channel Relay Output, D5091S is a relay module suitable for the switching of
safety related circuits, up to SIL 3 level according to IEC 61508:2010 Ed.2 for high risk
industries. It provides isolation between input and output contacts.
Two mutually exclusive (by DIP-Switch programming) monitoring circuits are provided:
1) line input monitoring, to allow DCS/PLC line monitoring function: when enabled, the
module permits a wide compatibility towards different DCS/PLC. Driving line pulse
testing, executed by DCS/PLC, is permitted by a dedicated internal circuit, to
prevent relay and LED flickering.
2) low voltage input monitoring: when enabled, the module reflects a high impedance
state to the control unit when the driving voltage is below the specified threshold.
D5091S provides 1 SPDT contact for two different safety functions:
1) SIL 3 Safety Function for Normally De-Energized load (energized in fail safe state)
is available at Terminal Blocks 7-8. The driving signal is normally low (0 Vdc),
the relay is normally de-energized, contact is open and load is de-energized.
The safety function is met when the driving signal is high (24 Vdc),
the relay is energized, contact is closed and load is energized.
At Terminal Blocks 9-10 is also available a service contact (for service load) with
opposite (not SIL) function.
2) SIL 3 Safety Function for Normally De-Energized load (energized in fail safe state)
is available at Terminal Blocks 9-10. The driving signal is normally high (24 Vdc),
the relay is normally energized, contact is open and load is de-energized.
The safety function is met when the driving signal is low (0 Vdc),
the relay is de-energized, contact is closed and load is energized.
At Terminal Blocks 7-8 is also available a service contact (for service load) with
opposite (not SIL) function.
Mounting on standard DIN-Rail or on customized Termination Boards,
in Safe Area / Non Hazardous Location or in Zone 2 / Class I, Division 2 or Class I, Zone 2