5
3. The control function that activates each relay output is pre-configured at the factory
based on the options selected. To change relay activation, see on page 13.
4. Refer to label inside lower panel cover for specific relay board configuration supplied.
5. Relays configured as “dry contact” should only have D.C. voltage ran through them. The GND
connection point replaces the NEU when configured for dry contact. (Example: Use GND and N.O.
for a normally open dry contact relay output.)
!
WARNING:
If jumpers are not configured for dry contact, line voltage will be supplied.
Relay Card Wiring
Rev. I Relay Card
Rev. N Relay Card
FUSE
NET
GRD
N.O.
N.C.
FUSE
NET
GRD
N.O.
N.C.
FUSE
NET
GRD
N.O.
N.C.
FUSE
NET
GRD
N.O.
N.C.
FUSE
POWER INPUT
H N G
Dry contact
115volt relay
NET
GRD
N.O.
N.C.
Ribbon Cable
2
1
10
9
Relay Card Rev. D
See note below
Jumpers above relay can change it
to a dry contact relay. Use GRD and
N.O. for a N.O. dry contact relay.
Powered relay
Dry contact
*
Relays 6-20 only on
multi-system controllers
INPUT
FUSE
FUSE
FUSE
FUSE
FUSE
FUSE
2
1
10
9
NEU
GND
N/O
N/C
NEU
GND
N/O
N/C
NEU
GND
N/O
N/C
NEU
GND
N/O
N/C
Relay
1
Relay
2
Relay
3
Relay
4
Relay
5
R1
R2
R3
R4
R5
Incoming
Power Fuse
15 amp
H N G
Incoming
Power
Relay Fuses
are 3 amp
Relays are shown configured for powered outputs.
[ Change jumpers to these configurations for dry contact. ]
Relays
1-3
Relays
4 & 5
Relay Card
Rev N
R1
R2
R3
R5
MegaTron relay card revision N adds a 15 amp fuse on the incoming power
to the board and small LED’s for each realy to indicate when the motherboard
has called for it to be activated.
Rev N Relay Board
NEU
GND
N/O
N/C
R4
LED
LED
LED
LED
LED
1
2
3
5
4
Motherboard Connections
System Card Connections
XSi
Mega
tron
Main
, Re
v.
VDC Output
Connections
Gnd
Gnd
-12
-12
+12
+12
+5
+5
Flow Meter Inputs
+5
Gnd
Gnd
Input 1
Input 2
Input 3
Input 4
LED
Cable
Comm Card
Slot
4-20mA
Slot
Open
System
Slot
Battery
LED
Ground
Digital Input 5
Digital Input 4
Digital Input 3
Ground
Digital Input 2
Digital Input 1
Digital Input Card
Note: Use 22 AWG
(.76 mm) twisted
pair shielded wire
for all of these low
voltage signal
connections.
