RMI-30:36:BDI-36: RMI-30:36:BDI-36: Radio Magnetic Indicators

Product Catalog - Business and Regional

RMI-30/36/BDI-36
Radio Magnetic Indicators

Back

Click to Enlarge

KEY OWNER/USER BENEFITS

RMI-36 and BDI-36 accepts sin/cos or conventional three-wire synchro ADF and VOR inputs

RMI-30 accepts sin/cos VOR and conventional three-wire synchro ADF inputs

RMI-36 and BDI-36 pointers that operate independently in dual systems employing split 400 Hz power supplies

High-reliability through solid-state design and the elimination of relays and several resolvers

Annunciation of the selected pointer mode only in the RMI-36 and BDI-36

Optional bootstrap compass transmitter to drive other instruments

Integral wedge lighting that provides uniform illumination of indicator face

Front or rear panel mounting

Heading flag monitors servo error, compass valid and instrument power

Pointer that parks to the three o'clock position with loss of signal

OVERVIEW

The Collins RMI-30/36/BDI-36 Radio Magnetic Indicators display aircraft heading information on a calibrated servo driven compass card. Bearing to either Automatic Direction Finder (ADF) or VHF Omnidirectional Radio Range (VOR) stations is provided by two pointers; each read against the compass card.

DESCRIPTION

The RMIs provide aircraft heading information on a calibrated servo driven compass card read against a fixed lubber line. A heading flag monitors servo error, compass valid and instrument power. Bearing to either ADF or VOR stations is provided by two pointers, each of which is read against the compass card. Each pointer may be switched independent of the other to a separate ADF or VOR receiver by an annunciated pushbutton switch.

There are two identical channels in the indicators to drive their respective pointers. Each channel in the RMI-36 and BDI-36 can accept ADF or VOR in either three-wire (x, y, z) or two-wire (sin/cos) form. In the RMI-30, each channel can accept VOR in two-wire (sin/cos) form and ADF in three-wire (x, y, z) form.

There is a monitoring circuit in the indicators that accepts a voltage from the ADF and navigation receivers and parks the respective pointer at the three o'clock position in the absence of this voltage input.

The RMI-30 and RMI-36 operate in conjunction with an ADF receiver, a navigation receiver and a compass system.

The BDI-36 is basically an RMI-36 with dual distance displays. These displays indicate distance for two independent Distance Measuring Equipment (DME) stations. Each display has three digits and indicates distance to the nearest tenth of a mile below 100 miles. Each display has a DME HOLD annunciator. The RMI and DME electronics are functionally independent.

TYPICAL SYSTEM

RMI-30 Radio Magnetic Indicator
Type	Qty	Description	Part Number
RMI-30	1	Radio Magnetic Indicator	622-4938-001

RMI-36 Radio Magnetic Indicator
Type	Qty	Description	Part Number
RMI-36	1	Radio Magnetic Indicator	622-2506-003

BDI-36 Bearing Distance Indicator

Type

Qty

Description

Part Number

BDI-36

Bearing Distance Indicator

622-3702-011

Note(s):

See Installation Hardware table for connectors and other installation items

SPECIFICATIONS

Certification
	RMI-30	RMI-36	BDI-36
FAA TSO	C6c	C6c	C6c
Environmental	DO-138	DO-138	DO-138
	DAPAAAXXXXXX	GAPAAAXXXXXX	GAPAAAXXXXXX

Physical Characteristics
	RMI-30	RMI-36	BDI-36
Height	85.73 mm (3.375 in)	85.73 mm (3.375 in)	106.04 mm (4.175 in)
Width	85.73 mm (3.375 in)	85.73 mm (3.375 in)	85.72 mm (3.375 in)
Length	185.67 mm (7.310 in)	185.67 mm (7.310 in)	185.67 mm (7.310 in)
Weight	1.2 kg (2.6 lb)	1.3 kg (2.8 lb)	1.5 kg (3.3 lb)
Mounting	Panel mount, front or rear	Panel mount, front or rear	Panel mount, front or rear

Environmental
	RMI-30	RMI-36	BDI-36
Temperature	-15 to +55°C	-15 to +55°C	-15 to +55°C
Altitude	15,000 ft	40,000 ft	15,000 ft

Power Requirements
	RMI-30	RMI-36	BDI-36
Power	28 V DC, 600 mA	28 V DC, 600 mA	28 V DC, 820 mA
	26 V AC, 400 Hz,180 mA	26 V AC, 400 Hz, 10 mA	26 V AC, 400 Hz, 10 mA
Lighting	5 V AC/DC, 460 mA or	5 V AC/DC, 540 mA or	5 V AC/DC, 540 mA or
	28 V AC/DC, 80 mA	28 V AC/DC, 96 mA	28 V AC/DC, 96 mA

Operational
	RMI-30	RMI-36	BDI-36
ADF 1 and ADF 2
Signal	Three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line	Two-wire sin and two-wire cos DC, 8 ±0.5 V DC sin/cos; or three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line	Two-wire sin and two-wire cos DC, 8 ±0.5 V DC sin/ cos; or three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line
Reference	Two-wire, 26 V AC rms, 400 Hz	26 V AC rms, 400 Hz (for three-wire synchro only)	26 V AC rms, 400 Hz (for three-wire synchro only)
Input Impedance	CRH-10-AS-4 or equiv. Z_ro = 27.5 + j174 Z_so = 7.7 + j30.5 Z_rss = 47 + j16	5 kilohms minimum	5 kilohms minimum
ADF 1 and ADF 2
Reference Power	0.6 nominal	26 V AC, 3 mA maximum	26 V AC, 3 mA maximum
Pointer Reference	180° index, positive rotation reference Excitation same phase as ADF	DC signal: 0° index with cos maximum positive and sin null Positive rotation reference with cos decreasing and sin increasing positive for increasing degrees Three-wire type: pointer ARINC referenced at 180° with a positive rotation reference	DC signal: 0° index with cos maximum positive and sin null Positive rotation reference with cos decreasing and sin increasing positive for increasing degrees Three-wire type: pointer ARINC referenced at 180° with a positive rotation reference
Positioning Accuracy	Within 2.0°	Within 2.0°	Within 2.0°
Sensitivity	Better than 0.5°	Better than 0.5°	Better than 0.5°
Dead zone	Less than 1.0°	Less than 1.0°	Less than 1.0°
Response	Greater than 180° per second undamped	Greater than 90° per second undamped	Greater than 90° per second undamped
VOR 1 and VOR 2
Signal	Two-wire sin and two-wire cos square wave, 7.9 V AC zero-to-peak maximum sin or cos 400 Hz square wave	Two-wire sin and two-wire cos square wave, 7.9 V AC rms ±10%, 400 Hz maximum sin or cos; or three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line	Two-wire sin and two-wire cos square wave, 7.9 V AC rms ±0%, 400 Hz maximum sin or cos; or three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line
Reference	Two-wire 26 V AC rms 400 Hz sin wave	26 V AC rms, 400 Hz sin or square wave	26 V AC rms, 400 Hz sin or square wave
Input Impedance	CDSH-8-A-4 or equiv. Z_ro = 38 + j122 Z_so = 250 + j830 Z_rss = 52 + j12.5	5 kilohms minimum	5 kilohms minimum
Reference Power	0.23 W nominal	26 V AC, 3 mA maximum	26 V AC, 3 mA maximum
Pointer Reference	0° index with cos maximum in-phase and sin null Positive rotation reference with cos decreasing and sin increasing in-phase for increasing degrees	AC signal: 0° index with cos maximum in-phase and sin null Positive rotation reference with cos decreasing and sin increasing in-phase for increasing degrees Three-wire type: pointer ARINC referenced at 180° with a positive rotation reference	AC signal: 0° index with cos maximum in-phase and sin Positive rotation reference with cos decreasing and sin increasing in-phase for increasing degrees Three-wire type: pointer ARINC referenced at 180° with a positive rotation reference
Positioning Accuracy	Within 2.0°	Within 2.0° (synchro input) Within 2.1° (square wave input)	Within 2.0° (synchro input) Within 2.1° (square wave input)
Sensitivity	Better than 0.5°	Better than 0.5°	Better than 0.5°
Deadzone	Less than 1.0°	Less than 1.0°	Less than 1.0°
Response	Greater than 180° per second undamped	Greater than 90° per second undamped	Greater than 90° per second undamped
Heading Display
Signal	Three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line	Three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line	Three-wire synchro, 11.8 V AC rms, 400 Hz line-to-line
Reference	Two-wire, 26 V AC rms, 400 Hz	26 V AC ±10%, 400 Hz	26 V AC ±10%, 400 Hz
Input Impedence	CTH-8-A-40 or equiv. Z_ro = 470 + j1770 Z_so = 81 + j330 Z_rss = 590 + j190	CTH-8-A-40 or equiv. Z_ro = 470 + j1770 Z_so = 81 + j330 Z_rss = 590 + j190	CTH-8-A-40 or equiv. Z_ro = 470 + j1770 Z_so = 81 + j330 Z_rss = 590 + j190
Reference Power	0.1 W nominal	26 V AC, 3 mA maximum	26 V AC, 3 mA maximum
Card Indexing	0° index, positive rotation referenceExcitation same phase as compass	ARINC index reference at 0° positive rotation reference	ARINC index reference at 0° positive rotation reference
Position Accuracy	Within 1.0°	Within 1.0°	Within 1.0°
Sensitivity	Better than 0.1°	Better than 0.2°	Better than 0.2°
Deadzone	Less than 0.2°	Less than 0.3°	Less than 0.3°
Response	Greater than 20° per second with minimum overshoot	Greater than 20° per second with minimum overshoot	Greater than 20° per second with minimum overshoot
Bootstrap Compass Transmitter
Signal	11.8 V AC rms, line-to-line	11.8 V AC rms, line-to-line	11.8 V AC rms, line-to-line
Reference	26 V AC rms, 400 Hz	26 V AC rms, 400 Hz	26 V AC rms, 400 Hz
Impedence	Z_ro = 32 + j150 Z_so = 7.3 + j26.2 Z_rss = 55 + j17	Z_ro= 32 + j150 Z_so= 7.3 + j26.2 Z_rss= 55 + j17	Z_ro = 32 + j150 Z_so = 7.3 + j26.2 Z_rss = 55 + j17
DME Display
Data Signal			32 bit serial word per ARINC 568
Sync Pulse			ARINC 419
Clock			11 kHz per ARINC 419

SELECTION GUIDE

Radio Magnetic Indicators

Panel

Lighting

Color

Compass Bootstrap

Type

28V

BL/WH

Gray

Black

Yes

Notes

Part Number

RMI-30

622-4938-001

622-4938-007

RMI-36

622-2506-003

622-2506-004

622-2506-006

622-2506-008

Note(s):

Legend reads NAV instead of VOR

Bearing Distance Indicators
	Panel
	Lighting				Color		Compass Bootstrap		Connector Retainer
Type	5V	28V	BL/WH	CL/WH	Gray	Black	Yes	No	Slide	Screw	Part Number
BDI-36	X		X		X		X			X	622-3702-009
	X			X	X		X			X	622-3702-014

INSTALLATION HARDWARE

RMI-30
Type	Qty	Description	Part Number
	1	Connector, mating, scintilla PT06A-20-41S(SR)	371-6200-000

RMI-36
Type	Qty	Description	Part Number
Option A	1	Connector (crimp) DDMA-50S-FO	371-0213-050
	50	Contacts (crimp)	371-0213-110
	1	Connector slide lock	370-2297-000
	1	Cable hood, clamp	371-0187-000
Option B	1	Connector, Cannon HDC50F-200-59 (solder pins)	371-0181-000
	1	Connector slide lock	370-2297-000
	1	Cable hood, clamp	371-0187-000

BDI-36
Type	Qty	Description	Part Number
Option A	1	Connector (Cannon DDMA-50S-FO) (crimp)	371-0213-050
	50	Contacts (crimp)	371-0213-110
	1	Retainer, slide connector	370-2297-000
	1	Retainer, screw connector	371-0040-060
	1	Cable hood, clamp	371-0187-000
	1	Connector (Cannon DBMA-25S-FO)	371-0213-030
	25	Contacts (crimp)	371-0213-110
	1	Retainer, slide connector	370-2295-000
	1	Retainer, screw connector	371-0040-030
	1	Cable hood, clamp	371-0185-000
Option B	1	Connector, 50 pin (solder)	371-0181-030
	1	Retainer, slide connector	370-2297-000
	1	Retainer, screw connector	371-0040-060
	1	Cable hood, clamp	371-0187-000
	1	Connector, 25 pin (solder)	371-0221-000
	1	Retainer, slide connector	370-2295-000
	1	Retainer, screw connector	371-0040-030
	1	Cable hood, clamp	371-0185-000