User`s manual

XP8300 Getting Started s 19
XP8300 Configuration
The XP8300 board holds six high-power relays. Each XP8300 relay has
the following specifications:
 Standard coil voltage 24 V DC.
 Contact ratings:
10 A at 24 V DC
10 A at 120 V AC
7 A at 250 V AC resistive
maximum.
Pin 1 is the common. Pin 5 goes to a high-voltage/high-current driver on
the relay board. Pin 2 is for the actuation voltage. Turning on the driver
allows current to flow through the coil, switching on the relay. Pin 3 is the
normally open contact. Pin 4 is the normally closed contact.
Each relay is protected by a 10A fuse on pin 1. To help eliminate tran-
sients, a metal oxide varistor (MOV) is attached between pin 1 and pin 3
on each relay. An LED is connected in line with the coil on each relay, and
lights up when current passes through the coil.
Althought the relays are rated at up to 10 A, and are protected
with 10 A fuses, the size of the traces on the printed circuit
boards limits the current through each relay to 6 A.
Headers H1, H2, and H4 are used to connect external devices to the relays.
Pin 1 and pin 3 connections for all relays are provided on headers H1 and
H2. In addition, header H4 provides pin 4 connections for relays 4 and 5,
allowing relays 4 and 5 to be used as SPDT relays. Relays 0 to 3 do not
have their pin 4 available for external connection, and therefore can be
used only as SPST relays.
Figure 2-3 illustrates the pinouts for the relay connection pins on headers
H1, H2, and H4.
Figure 2-3. Relay Connection Pins
1
32
45
Configuration: SPDT
Coil Actuation
Voltage: 24 V DC
Figure 2-2. Relay Circuit
Rel 4
pin 4
H1 H2 H4
H3
Rel 0
pin 3
Rel 0
pin 1
Rel 1
pin 3
Rel 1
pin 1
Rel 2
pin 3
Rel 2
pin 1
Rel 3
pin 3
Rel 3
pin 1
Rel 4
pin 3
Rel 4
pin 1
Rel 5
pin 3
Rel 5
pin 1
Rel 5
pin 4
V+
GND