Pentair Goyen Mecair FFA, Installation And Operation Manual, Page: 26 / 44

20 INSTALLATION AND OPERATION MANUAL – OWNER'S RECORD FFA MANUAL – FILTER FAILURE ALARM
6.7 CONNECTING THE CONTROL UNIT
Figure 7: Control unit PCB connections (inside enclosure lid)
1 Mains power terminals
2 Sensor connector (CN3)
3 Earth strap (do not remove)
4 Alarm relays/4–20 mAconnections (CN4)
5 Clamp (securing the mains power cable)
6.7.1 Connecting the Sensor Cable to the Control Unit
NOTE: Keep the length of exposed screen to an absolute minimum (long screens, or ‘pigtails’, degrade EMC
performance).
Connect the sensor by routing the four-core data cable from the control unit through the cable gland nearest the
CN3
connector (see Figure 7). Refer to Sensor Cable Connection on page 18 for details on cabling.
6.7.2 Connecting the Alarm Relays (CN4)
Referring to Figure 7 above, pass a suitable sensor cable through the nearest cable entry gland and connect it to
the required contacts on connector
CN4 (see table). Both relays are of the SPCO type and are fail-safe in operation.
CN4 CONNECTOR (TOP TO BOTTOM):
PIN No. WIRE COLOUR
RELAY 1
1
2
RELAY 2
3
4
4–20 MA
5
6
6.7.3 Connecting the 4–20 mA Output (Option)
Referring to the table in section 6.7.2 above, pass a suitable cable through the nearest cable entry gland and connect
it to
CON4 as shown.