Honeywell SYA14 Series Manual page 666

FIG 3. QUADRATIC TOTAL CURRENT LIMIT
32 50 68
Ambient temperature
Figure 3. displays the maximal recommended
external temperature versus the total load of all the
safety module contacts. To use this curve, do the
following:
(1) Square the current in each contact branch, then
sum all the results to obtain the vertical axis
value.
(2) Follow the horizontal line from the obtained
value and note intersection of the appropriate
curve.
(3) Follow the intersection point down to determine
the maximal
temperature. (Ex: ∑ Ι
safety contacts, then T = 35 °C (95 °F).
If the module is located in a higher temperature
environment, the lifetime
components may be reduced. Ventilation of the
cabinet may be required.
MECHANICAL INSTALLATION
The FF-SRS5924 must be installed inside a NEMA 3
(IEC IP54) rating enclosure or better. The module
can be mounted easily onto a 35mm (1.38 in.) width
DIN rail (see figures 4 and 5 below for installation
and mounting).
Specific features of this product include removable
block terminals. This feature provides easy access to
wiring during installation and reduces machine
downtime during maintenance.
FIG 4. MOUNTING DIMENSIONS (
a Width: 22.5 mm 0.89 in.
b Height: 84 mm 3.31 in.
c Depth: 121 mm 4.77 in.
a
Rail
107015-10 EN FR26 GLO 1198 Printed in Germany
Limit curve
86 104 122 140 T(°F)
recommended external
2
2
= 100 A current inside
of the electronic
for reference only)
b
c
FIG 5. INSTALLATION DIAGRAM
FIG 6. REMOVABLE TERMINAL BLOCKS
CONTROL RELIABILITY
"Control Reliability" means that "the device,
system or interface shall be designed, constructed
and installed such that a single component failure
within the device, interface or system shall not
prevent normal stopping action from taking place but
shall prevent a successive machine cycle." (ANSI
B11.19-1990, 5.5)
SAFETY LEVEL OF INTERFACES
The safety function of the FF-SRS5924 Safety
control module relies on a single safety input only.
Therefore this module can only be used in interfaces
up to Category 2 per EN 954-1 European norm.
If a single safety input does not provide the level of
safety required, use one of the dual channel safety
control modules (FF-SRS5925, FF-SRS5935, FF-
SRS5988).
INTERNAL DESIGN
However, the internal design of this device meets the
highest requirements (Category 4 as described in
the EN 954-1 European norm). Category 4 safety
control modules are designed and manufactured in
such a way that a single breakdown or an
accumulation of internal failures does not lead to the
loss of the safety function when a dangerous
situation arises. The FF-SRS5924 safety control
module functions with internal redundancy and
positive self-check monitoring.
ELECTRICAL INSTALLATION
ELECTRICAL SHOCK
Remove power from FF-SR Series control modules
and machine during installation.
Failure to comply with these instructions could
result in death or serious injury.
Removable
Terminal Block
3