trk1 Installation Manual
12
Relay Output Specifications
Maximum current 1A @ 24VDC
Relay Contacts Schematic
Figure 10: Relay Contacts
NC
: Terminal for connecting one of a pair of wires that leads to an external device on a circuit
configured for NORMALLY CLOSED
C
: Terminal for connecting the second of a pair of wires for the COMMON lead of an external
device regardless of whether the device is operated in a NORMALLY OPEN or NORMALLY CLOSED
configuration
NO
: Terminal for connecting one of a pair of wires that leads to an external device on a circuit
configured for NORMALLY OPEN
A relay output terminal has two options for connecting a device:
Option 1: NORMALLY CLOSED configuration
Option 2: NORMALLY OPEN configuration
The output supports opto-isolated signal for a single external device. Signals can be sent as continuous
(ON/OFF) or single pulse of predefined duration.
To connect a device controller to a relay output of the unit
1.
Connect the leads from the external device controller to the respective terminal points on the
Spring Clamp Terminal Block according to your requirements (NORMALLY OPEN or NORMALLY
CLOSED configuration). See Connecting Leads to a Spring Clamp Terminal Block (page 18). The
three terminal points for the relay output are located on the top right of the terminal block. See
Figure 3: trk1 Power Connection Panel.
2.
Connect the terminal block to the external devices connector on the power connection panel of
the unit. See Figure 3: trk1 Power Connection Panel.
3.
Connect the other end of the cable to the external controller, which receives the signal from
the unit and controls/powers the external device.
Warning:
The signal from the relay output of the unit must be used as an indicator and not for direct
control of a device.
Caution:
To prevent damage to the unit, do not exceed the voltage and current ratings for the relay
terminals.
