Machine Stop Contacts (Receiver Terminals 4 And 5); Permanent Self-Checking (Monitoring) - Honeywell FF-SYA14 Series Manual

4.6 Machine Stop contacts (Receiver terminals 4 and 5)

Features
Type
Switching capacity
Voltage drop
Protections
POWER CUT-OFF PROTECTION
The FF-SYA safety static outputs withstand 4,5 ms power cut-off. The use of the optional ac to dc power supply improves the
power cut of resistance up to 20 ms.

4.6.1 Permanent Self-checking (Monitoring)

Safety static outputs OSSD1 and OSSD2 (Output Signal Switching Devices) are switched simultaneously. An internal
permanent self-check (monitoring) verifies that both static outputs always have the same status. If one of the two outputs
remains accidentally closed, the remaining output would no longer be able to close. Similarly, a possible internal or external
short-circuit of one of the two outputs will immediately bring about the opening of the other output. An internal or external
short-circuit between the two outputs will also lead to the opening of the light curtain outputs. It is therefore important to use
the two outputs to prevent operation of the machine.
CONNECTION OF FF-SYA STATIC OUTPUTS TO THE POWER SUPPLY
By-passing the FF-SYA static outputs by connecting them to the power supply will be detected by the FF-SYA safety light
curtain.
If the static outputs are temporarily connected to +24 Vdc, the outputs will remain open for an additional 100 ms after the
outputs are removed from this connection. This condition may be detected by the relaying interface.
If the static outputs are temporarily connected to 0 Vdc, the output will remain permanently open, even after the outputs are
removed from this connection. Normal operation is achieved by switching the power off and on.
IMPROPER USE OF THE MACHINE STOP CONTACTS
Always use the two static safety outputs to control the machine movement.
Failure to comply with these instructions could result in death or serious injury
107031-33-EN FR26 GLO 1101 Printed in France
Terminal strip Pin-out
FF-SYA GGGGG GGGGG GGGGG T2 GGGGG
6 4 1 5 3 2
(Screws this side)
Terminal strip Receiver
(Top view)
1 : (dc+) main power supply
2 : (dc-) main power supply
3 : (dc+) outputs power supply
6 : (dc-) outputs power supply
4 : output (loads connection)
5 : output (loads connection)
: earth
static dc (Normally Open contacts)
short-circuits, overloads, reversed polarity, micro-cut-off (4,5 ms)
Machine Stop Contacts
0,5 A/24 Vdc
< 2 Vdc
47