Ampac EV3000 - Mains Connection

Page 30
EV3000 INSTALLATION & COMMISSIONING
10.7 MECP To SECP Data Connections
The 302-4580 is the serial loop interface RS-485 connection board which provides communication
via a redundant loop from the MECP to the SECP's.
10.7.1 Connections
Field Connections
Use
CN3 - +
COMMS Cable IN
CN3 - -
COMMS Cable IN
CN3 - Shield
SHIELD
CN4 -
+COMMS Cable OUT
CN4 - -
COMMS Cable OUT
CN4 - Shield
SHIELD
NOTE: The polarity of the communication cable must be maintained.
Factory Connections
Use
CN1
Internal COMMS Bus
Out: CN13 ( MAF 302 – 4220 )
CN2
Internal COMMS Bus
In: CN14 ( MAF 302 – 4220 )
10.8 CN5 + CN6 Power Supply to Board
10.8.1 Fusing
Fuse
Use
Rating
F1
8V DC Input
1 A (T) Pico
F2
Control Voltage
500 mA (T) Pico
F3
Control Voltage
500 mA (T) Pico
EARTH
900202
882046 22130
302-4580
SHIELD
SHIELD
- +
SHIELD
- +
COMMS OUT +
COMMS OUT -
COMMS IN +
COMMS IN -
SHIELD
F2
F3
D12
D10
Q3
U16
F1
+8
CN2
CN1
U3
U5
U2
U1
U4
Q2
U10
U9
U12
CN4
CN6
CN5
CN3
U11
U7
U8
Q1
TX1
U14
U15
U13
+
Q4
Q5
+5
TO
CN13
TO
CN14
MAF
Figure 26: 302-4580 Serial Isolation Board
Note: Comms cable must be screened twisted 2 pair.