Honeywell SYA14 Series Manual page 591

Figure 4.9 : Connection of the SMs sensors
The following reversed connection is recommended for a better failure resistance
+24Vdc
sensors with relay outputs
0.5A
SM1
24 23
(+) (-)
FF-SRM
(+) (-)
9 10
SM2
0V
4.6.2 EM1 & EM2 inputs (terminals 11-12 & 21-22)
The EM1 and EM2 sensors outputs connected to the module terminals 11-12 and 21-22 must
be closed if no object is detected.
IMPROPER INSTALLATION
•
ALWAYS use two EM sensors to interrupt a muting sequence.
•
If the safety light curtain is used to interrupt the muting sequence on a conveyor
application, NEVER connect one Normally Open contact of the protective equipment only on
both EM1 and EM2 inputs (see chapter 4.9.1 Conveyor applications / One-way muting using
two sensors).
•
On a mechanical press, NEVER connect one SM sensor only on both EM1 and EM2
inputs (see chapter 4.9.1 Press applications / Muting of a safety light curtain on a
mechanical press).
Failure to comply with these instructions could result in death or serious injury.
TIMING CONDITION
The muting sequence stops 40 ms after the release of the first EM sensor. For more
information, refer to chapter 2.4.3 EM inputs.
107004-15 EN FR26 ROW 0899 Printed in France
+24Vdc
sensors with static outputs
0.5A PNP SM1
24 23
(+) (-)
FF-SRM
(+) (-)
9 10
SM2 NPN
0V
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