User`s manual

52 s Getting Started SE1100
SE1100 Configuration
The SE1100 board holds four high-power relays. Each SE1100 relay has
the following specifications:
 Standard coil voltage 24 V DC.
 Contact ratings:
10 A at 24 V DC
or 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 6.3A fuse on pin 1. To help eliminate
transients, a resistor/capacitor pair 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 10 A, they are protected with
6.3 A fuses because the size of the traces on the printed circuit
boards limits the current through each relay to 6 A.
Header J1 is used to connect external devices to the relays.
Figure 8-5 illustrates the pinouts for the relay connection pins on header J1.
Figure 8-5. Relay Connection Pins
1
32
45
Configuration: SPDT
Coil Actuation
Voltage: 24 V DC
Figure 8-4. Relay Circuit
COMCOMCOMCOM
C = normally closed
O = normally open
M = common
J1
112
Relay 3
Relay 2 Relay 1 Relay 0