4.6.3. SELV ports
The
e
-Brick internal 24V power supply is classified as Safety Extra Low Voltage (SELV) in
accordance with clause 2.3 of EN60950. The
e
-Brick is designed for connection of GEW
approved equipment only to ports P1-P8. With the exception
of lamp output terminals [P3A-B] and
mains input terminals [P5A (9/12kW) or P5 A-C (22kW)] interfaces are SELV; it is recommended
that connections are only made to equipment that complies with the SELV safety classification.
Certain ports may exceed SELV voltages (30VDC 60Vrms) within the specified ratings shown in
4.6.3.1 to 4.6.3.9
4.6.3.1. P1: Press interface
Pin connection Signal name Rating / connection
A1 Impression
A5 Impression_rtn
‘Volt free’ contact input from press
A3 Fan_start
A4 Fan_start_rtn
24VDC relay output to drive fan contactor
coil [also available on P7]
A2 0V 0V reference for
e
-Brick
B1 E-stop
B2 E-stop_rtn
‘Volt free’ contact input from press
B3 Fan_healthy
B4 Fan_healthy_rtn
‘Volt free’ contact input from press
[Also available on P7]
B5 Speed 0-10V speed signal from press
C5 Speed_rtn 0V reference for press speed signal
C1 Ready
C2 Ready_rtn
‘Volt free’ relay output to press.
Contact rating 1A @ 24Vdc / 120Vac
C3 Fault
C4 Fault_rtn
‘Volt free’ relay output to press.
Contact rating 1A @ 24Vdc / 120Vac
4.6.3.2. P2: Communications port (out)
P2: Communications port (Master)
Pin connection Signal name Rating / connection
1 RS485A1 RS485 bus
2 RS485B1 RS485 bus
3 E-stop
4 E-stop_rtn
‘Volt free’ safety relay output to E-stop input
on next slave
e
-Brick.
Contact rating 1A 120Vac / 3A 24Vdc
5 N/C No connection
6 KEY Polarising key, no connection
7 24V 24V supply for reprogramming, for GEW
use only.
8 RS485_rtn RS485 Screen
GEW UV
e
-Brick installation and operating manual 25 of 49
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