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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 | 1 | Radio Magnetic Indicator | 622-4938-001 |
| RMI-36 | 1 | Radio Magnetic Indicator | 622-2506-003 |
| BDI-36 | 1 | Bearing Distance Indicator | 622-3702-011 | Note(s): | See Installation Hardware table for connectors and other installation
items |
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SPECIFICATIONS
FAA TSO | C6c | C6c | C6c | Environmental | DO-138 | DO-138 | DO-138 | | | DAPAAAXXXXXX | GAPAAAXXXXXX | GAPAAAXXXXXX |
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 |
Temperature | -15 to +55°C | -15 to +55°C | -15 to +55°C | Altitude | 15,000 ft | 40,000
ft | 15,000 ft |
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 |
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. Zro = 27.5 + j174 Zso = 7.7 + j30.5 Zrss =
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. Zro =
38 + j122 Zso = 250 + j830 Zrss =
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. Zro = 470 + j1770 Zso = 81 + j330 Zrss = 590 + j190 | CTH-8-A-40 or equiv. Zro = 470 + j1770 Zso = 81 + j330 Zrss = 590 + j190 | CTH-8-A-40 or equiv. Zro = 470 + j1770 Zso = 81 + j330 Zrss = 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 | Zro = 32
+ j150 Zso = 7.3
+ j26.2 Zrss = 55
+ j17 | Zro = 32 + j150 Zso = 7.3 + j26.2 Zrss = 55 + j17 | Zro = 32 + j150 Zso = 7.3 + j26.2 Zrss = 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
RMI-30 | | X | X | | X | X | | | 622-4938-001 | | | | X | X | | X | X | | 1 | 622-4938-007 | RMI-36 | | X | X | | X | X | | | 622-2506-003 | | | X | | X | | X | X | | | 622-2506-004 | | | X | | X | X | | | X | | 622-2506-006 | | | X | | X | X | | X | | | 622-2506-008 | Note(s): | Legend reads NAV instead of VOR
|
|
BDI-36 | X | | X | | X | | X | | | X | 622-3702-009 | | | X | | | X | X | | X | | | X | 622-3702-014 |
INSTALLATION HARDWARE
| | 1 | Connector,
mating, scintilla PT06A-20-41S(SR) | 371-6200-000 |
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 |
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 |
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