Honeywell SYA14 Series Manual page 590

4.6 Connection of sensors SM and EM
4.6.1 SM1 & SM2 inputs (terminals 9-10 & 23-24)
The SM1 and SM2 sensors outputs connected on module terminals 9-10 and 23-24 must be
open when the object is absent.
TIMING CONDITIONS
•
The SM sensors outputs must switch within a specific time frame.
•
The muting sequence starts 50 ms after reception of the second SM sensor
signals.
•
For more information, refer to chapter 2.4.2 SM inputs.
FUSES PROTECTION
The SM1 and SM2 inputs must be protected by an external 0.5A fuse connected on
terminal 1 (+24 V POWER).
DETECTED FAILURES
The following failures are detected and prevent a muting sequence from starting : absence
of one or both SMs sensors, permanent short-circuit on one of the SM inputs, connection of
a single sensor on both SM inputs.
Features
Type
Consumption
Low level
High level
Protections
56
SM1 & SM2 inputs
voltage free and without reference potential
10 mA / 24 Vdc
galvanic insulation : 500 Vdc, reversed polarity
107004-15 EN FR26 ROW 0899 Printed in France
2 mA max.
5 mA min.