Honeywell SYA14 Series, Manual

Page: 641 / 737

107011-10 EN FR26 GLO 0499 Printed in Germany 3
FIG 3. CURRENT VS. TEMPERATURE LIMIT
F
S
R2501
-22 32 50 68 86 104 122 140 T(°F)
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) Follow the horizontal line from the value (vertical
axis) equal to the current inside the safety
module contacts and note intersection of the
appropriate curve.
(2) Follow the intersection point down to determine
the maximal recommended ambient
temperature.
(Ex: 4 A current inside each two safety contacts,
then T = 43
°
C (109
°
F).
If the module is located in a higher temperature
environment, the lifetime of the electronic
components may be reduced. Ventilation of the
cabinet may be required.
MECHANICAL INSTALLATION
The FF-SR25980 must be installed inside a NEMA 3
(IEC IP54) rating enclosure or better. The module
can be mounted easily onto a 45mm width DIN rail
(see figures 4 and 5 below for installation and
removal).
FIG 4. MOUNTING DIMENSIONS (
for reference only)
FIG 5. INSTALLATION DIAGRAM
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)
OSHA 29 CFR 1910.217 states that “the control system
shall be constructed so that a failure within the system
does not prevent the normal stopping action from being
applied to the press when required, but does prevent
initiation of a successive stroke until the failure is
corrected. The failure shall be detectable by a simple test,
or indicated by the control system.”
Honeywell uses self-checking techniques that combine
reliability with safety. This means that a faulty component
in our system will make the safety control modules fail in a
safe mode.
The FF-SR25980 safety control module functions with
dual internal channel redundancy and positive self-check
monitoring.
a Width: 45 mm 1.77 in.
b Height: 74 mm 2.91 in.
c Depth: 121 mm 4.76 in.