Det-Tronics EQP Fire and Gas Detection/Releasing System SAFETY MANUAL - Manual (Page 10)

5.1 95-8599 8
This table indicates which EDIO channel configurations
are IEC 61508 SIL rated.
Definition SIL Rated
Unsupervised Input No
Unsupervised Output No
Smoke Detector No
Class A Output Yes
Class A Input Yes
Solenoid Output Yes
Class A Solenoid Output Yes
Class A Smoke Detector Input No
Class B Output with Monitoring Yes
Class B Input with Monitoring Yes
Detailed information regarding the use of the EQP
EDIO Safety Module is given in the appropriate data
sheets and user documentation (EQP instruction manual
number 95-8533). The information given here only
refers to the safety-related aspects of the module.
Outputs from the EQP Safety EDIO Module are normally
de-energized and are energized on command by the
Controller (for example to release an extinguishant by
opening a normally closed solenoid valve). Outputs will
hold last state on loss of communication with the controller.
Det-Tronics S 3 Safety System Software is used for
device configuration.
EDIO Digital Input Channel
A change in input state is only recognized if the new
input state is held for a filter time interval to ensure that
noise is not incorrectly interpreted as a change in the
input state. The input must be active for at least 750
milliseconds in order to be recognized.
For descriptions and examples of how to provide open,
and open/short circuit monitoring, and Class A or Class
B wiring on EDIO inputs, refer to the Installation section
of the EQP Instruction Manual, 95-8533. Refer to
Appendix A for the different l
DU
values for open versus
open and short circuit monitoring.
EDIO Digital Output Channel
The EDIO output channel is normally de-energized and
must employ line supervision to be safety rated.
For descriptions and examples of how to provide open,
and open/short circuit monitoring, and Class A or
Class B wiring on EDIO outputs, refer to the Installation
section of the EQP Instruction Manual, 95-8533. Refer
to Appendix A for the l
DU
value for open and open and
short circuit monitoring.
POWER SUPPLIES
The power supply selected must provide over-voltage
protection to the EQP System. The over-voltage
protection must be set for a maximum of 33 Vdc.
The EQP Safety System is NFPA-72 certified for use
with Det-Tronics EQP Power Supplies, power supply
monitoring, and ground fault monitoring.
Redundant power supplies can be implemented by
“pairing” supplies. This is not required for the certified
safety integrity level, but will improve availability.
The EQPSL devices must be operated between 18 and
30 Vdc. A 10% overvoltage will not damage the devices.
S 3 CONfIgURATION SOfTWARE
S 3 Software is an engineering tool for configuring
parameters and writing control programs (known as
Projects) that are downloaded to EQP Controllers. The
creation of the Project is the responsibility of the user
and must conform with the restrictions in this manual.
This Section describes the features of S 3 Software
applicable to the EQP Safety System. More general
information regarding the operation and use of S 3 can
be found in the S 3 manual (number 95-8560).
A summary of S 3 Software features specific to its use
with EQP Safety Systems is given below.
• Only input data from safety approved field devices
(X3301-SIL/Eclipse-SIL/EDIO-SIL/AIM-SIL) can be
used as safety data in EQP Safety Logic.
• Safety-related inputs and outputs are colored red to
distinguish them from non-safety related I/O.
• User function blocks that are suitable for safety-related
data are colored red to distinguish them from functions
that are not suitable for safety-related data.
• Floating point values are not safety rated and must not
be used in the safety-related logic.
• Numeric calculations are not error checked for overflow
or underflow and the results of such calculations are
not defined. It is the user’s responsibility to bound
inputs so such a condition cannot happen.
• Change control logging and event recording are
available within S 3 and EQP Safety Controllers.
While S 3 is acceptable for configuring a low demand SIL
2 EQP System, it shall not be part of the safety function.