User`s manual

SE1100 Overview s 47

Relay 3 Relay 2 Relay 1 Relay 0

R20

C19

C1 C2

R19

R18

R17

C20

C17

R21 R13

R16 R33

R15 R28

R14 R27

R23 R22

R31 R32

R24 R25

R29 R30

C3 C4

C5 C6

C7 C8

R11 R12

R10

C18

H.C.Driver Opto

Features

The SE1100 relay board is designed to interface to the digital outputs of

any Z-World controller. The boards four relays have a 6.3A fuse con-

nected to the common pin for overcurrent protection. In addition to the

fuses, a snubber circuit across the common and the normally open/

normally closed pins suppresses voltage spikes across the contacts. All of

the signals from the four SPDT relays are brought out to header J1.

The interface voltage has a range of 5 V to 24 V. A 24V DC supply is

needed to power the relays. When driving the relays with high-voltage

drivers, an SE1100 can be located up to 15 m (50 feet) from the controller.

The opto isolation between the controller and the relays provides an extra

level of assurance to guard against noise from high-voltage transients.

The LEDs on the relay board indicate the status of the relays. When an

LED is on, the relay associated with that LED is energized. When an LED

is off, the relay is in a default state. The default state is for the common

terminal to be connected to the normally closed terminal.

The onboard linear regulator provides the regulated +5 V to all the logic

elements. The relays and the LEDs are driven with the unregulated DC

input voltage. Altogether, the SE1100 draws approximately 80 mA from

the DC power supply input when all the relays are turned on.

Figure 7-2. SE1100 Relay Expansion Board Layout