RS21 Twenty-One Pole Relay Unit|Precision Aviation

Avionics, Switching Units : Precision Aviation

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RS21 Twenty-One Pole Relay Unit
Discontinued Item
(DAI Part# RS21)

The twenty-one pole relay unit was designed for use in Nav/GPS or other display/data switching installation applications while also attempting to meet any special requirements established by certification agencies. The 21-pole relay unit contains a group of relays that are energized and de-energized in unison. Available to the installer are twenty-one separate poles (switching contacts), each pole includes a common wiper, a normally closed contact and a normally open contact.

	14 or 28V power connections
	Low power sensing circuit
	Optional localizer override connection
	Circuit shielding
	Relay energize contact confirmation

Installation/Wiring

SPECIFICATIONS

Temperature	-40° to +70° (ambient)
Humidity	95% Non-considering
Electrical
28V Installation	+20 to +33VDC 200 mA energized/60 mA non-energized
14V Installation	+12 to +18VDC 200 mA energized/60 mA non-energized
Lower Power Sensing
28V Installation	18.25 ±0.5VDC/18.25 +1.0, -0.5 @ 40°C
14V Installation	10.25 ±0.5VDC/10.25 +1.0, -0.5 @ 40°C
Relay Energize Confirmation Time	100 mSec minimum to 250 mSec maximum; the realay contacts must be confirmed withing this time period to ensure that the relays remain energized
Interface Logic	Ground seeking continuous input for relay energize capable of sinking 200 mA. Ground seekng localizer energize input capable of sinking 10 mA.
Physical
Dimensions	1.5"H x 5.6"W x 3.8"D
Mounting	Bulkhead, 4 each #10 or #8 screws
Connector	78-pin male high density reliability D-sub connector