Internal relay connections

SIBTF10xx-1xx-Mx

Installation -- continued

The internal relay can activate an external fault indicator. The fault indicator connects to the relay contacts on the front panel. An example would be a fault circuit connected to a warning light located in a control room. The light can be connected in a normally open (NO) or normally closed (NC) configuration with respect to circuit common (C) to turn the light ON/OFF when a fault occurs.

To connect a fault indicator to the relay, view Figure 7 and then do the following:

1.Verify that the external power source is turned OFF.

2.Loosen the relay’s “NO” screw and then connect the fault indicator’s return lead to terminal “NO.” Tighten the screw to secure.

3.Loosen the relay’s “C” screw and then connect the fault indicator’s common lead terminal “C.” Tighten the screw to secure.

Or:

4.Loosen the relay’s “NC” screw and then connect the fault indicator’s return lead to terminal “NC.” Tighten the screw to secure.

5.Loosen the relay’s “C” screw and then connect the fault indicator’s common lead terminal “C.” Tighten the screw to secure.

Relay	NC	NC
Contacts	NC	NC
Contacts
(600W max.)
30 VDC	C	C
@2.0A	C	C
@2.0A
125 VAC
@0.5A	NO	NO

Figure 7: Internal Relay Connections

Two wiring scenarios:

•Wiring the relay in the normally closed (NC) configuration can be used to monitor alarm indicators connected in series, where any single event will cause all alarm indicators to trigger.

•Wiring the relay in the normally open (NO) configuration can be used to monitor alarm indicators connected in parallel, where any single event will cause that events alarm indicator to trigger: i.e., a light turning ON or OFF.

CAUTION: Calculate the maximum possible current in each power wire and relay-contact wire. Observe all electrical codes for maximum current allowed. If the current goes above the maximum ratings, the wiring could overheat and cause serious damage to the network wiring or equipment.

Installation -- continued

DIN-Rail

The industrial switch includes an aluminum DIN-Rail mounting bracket attached to the back panel of the enclosure. See Figure 8.

Back View

DIN Rail

Mounting Bracket

Figure 8: DIN-Rail Bracket

Mounting the enclosure to a DIN-Rail

CAUTION: The SIBTF10xx-1xx switch is convection cooled, requiring unrestricted bottom-to-top airflow. Mounting the device in other orientations could result in unreliable operation or device failure.

CAUTION: To prevent debris from falling through the ventilation holes, local and national electrical and fire codes might require orienting the device with its small-diameter vent holes downward.

To mount the enclosure onto a DIN-Rail:

1.Insert the top of the DIN-Rail into the upper slot of the mounting plate.

2.Push down and then rotate the industrial switch inward to snap it into place onto the DIN-Rail.

An illustration of the procedure is shown in Figure 9.

Step 1

Step 2

Mounting Plate

DIN-Rail

Figure 9: Enclosure Mounted to DIN-Rail

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