5494 Remote Control Unit

5494 uCode, Release Patches, and Feature Patches

IBM 5494 Remote Control Unit Brochure
CO2V4002 5494 Maintenance Information

Configuring 5494 Remote Control Units
Related Redbooks (DEAD)
Remote Control Unit R3.2 Bookshelf (DEAD)

5494 Front
5494 Planar
   P12 Floppy Controller Header Pinout
   P13 Operator Panel Controller Pinout
   P15 Speaker/Switch Assembly Pinout
Memory (56-pin SIMMs!)
Power Supply
Power Distribution
Floppy Drive
Operator Panel
   Controller Board
Normal Power-On Display Sequence
Model Conversions

5494 Front

5494 Planar 03F0330 [P] [P]

P1 30-pin header, unknown
P5-8 16-bit MCA slots
P10 SIMM2 56-pins!
P11 SIMM1 56-pins!
P12 Floppy Header
P13 Operator Panel
P14 Fan power
P15 Power / LEDs
P16,17 Power Supply Connector
S1 14.318 MHz osc
S2 32.00000 MHz osc
S3 24.00000 MHz osc
U13 80386SX-16
U17 57F1139
U20 23F8566
U21 DS1287 RTC
U40 27F4620
U53 27F4619
U54 63F7520
U61 23F9177
U63 02F9624
U77 Firmware 03F0312
U78 Firmware 03F0313
U79 intel 71F7834 (82077SL)
U84 DS1225AD-170 NVRAM

P12 Floppy Controller Header Pinout

P13 Operator Panel Controller Pinout

P15 Speaker/Switch Assembly Pinout


2MB ECC?? 56-pin SIMM.

53F7913, individual memory modules are 02G2871.

Power Supply P/N 03F0420 / KRON (?) 55JET064

Global Manufacturers' Services Valencia, Spain

Uses a Model 90 form factor PSU, but wimpier. No HD power plugs.

Input: 100 - 240 V, 1.6 - 0.78 A, 50 / 60 Hz

Output: 63.8 W
   +5 V 10 A
   +12 V 0.80 A
   -12 V 0.35 A

Uses an NMB Boxer fan, 3610NL-04W-B10 12 V, 0.13 A, ball bearings, brushless.

Power Distribution

Floppy Drive 52G3400 / PN 10H4267 [P]

Note: 64F0204 / 64F3197 BUT it has the Mitsubishi MF356F-822MB "*" floppy.

In IBM's eyes, there's no need for more than a one device cable... Bay B has the LCD display, Bay D has the "glove box" Bay C is inaccessible.

Why waste good money on even a twist? There can only be one... floppy [Highlander]. Why use a three-device cable like the Model 90 if you will only be able to use one device... ever...

Note that the 5494 does have the Adapter Card-Guide Assembly 33F8363. It does not have the 92mm Base Fan.

Operator Panel

   The operator panel consists of a keypad, an LCD, and four LEDs (Ready, Call 5494 Service, See PD Guide, and Test Mode) that indicate operating status. An 8051 controls the LCD, LEDs, and the keypad. Communications between planar and operator panel are through a serial port.

Controller Board

P2 LCD Panel
P3 Header to planar
P4 Tape connector to keypad
U4 intel 02F9476
Y1 8.000 MHz xtal


   The LCD has 16 character positions. It is blank and displays a cursor in the rightmost position when not in use. When the 5494 operator panel is in use, there will always be a message code (002-01 in the above example) displayed on the left-hand side of the LCD. The message codes are described in "Message Codes" in topic 3.1. When the 5494 is in use, the LCD can also contain, in the data field on the right-hand side of the LCD, a system reference code (SRC) or information as defined by the message code. In the example, the data field contains an SRC.

   If an error occurs before or during normal operation, both a message code and an SRC will be displayed on the LCD and an LED will be lit. If more than one error occurs during normal operation, the message codes and SRCs will cycle at 3-second intervals. If the error clears (a link is established after a failure, for example), the message code and SRC will be removed from the LCD by the 5494.


The keys on the keypad allow commands to be entered and sent to the 5494, and include:

REQ Initiates a request function
PF1 Used for special requests
PF2 Used for special requests
Esc Used to cancel a request
Alt Enables the alternate hexadecimal values of keys 4 through 9, to be used with keys PF1, PF2, and Esc for additional special functions. (Ed. Might be the SHFT key)
Enter Signals to the 5494 the end of an input string
Clear  Clears a value being entered and allows you to begin again
0 to 9 Numerics 0 to 9
Alt+4 Hexadecimal A
Alt+5 Hexadecimal B
Alt+6 Hexadecimal C
Alt+7 Hexadecimal D
Alt+8 Hexadecimal E
Alt+9 Hexadecimal F
Up arrow Scroll up through several choices or panels of data
Down arrow Scroll down through several choices or panels of data
Left arrow Move the cursor left or scroll to additional fields of data
Right arrow Move the cursor right or scroll to additional fields of data.

   If you hose the refstamp, the 5494 will not boot up and the error code '003-04   1' is displayed on the Op Panel.

Normal Power-On Display Sequence

Soon after the 5494 power pushbutton is set to ON (|):

  1. All LEDs are ON for 1 second.
  2. All LEDs are OFF for 1 second.
  3. The Test Mode LED is switched ON.
  4. 001-01 is displayed, indicating that POST is running.
  5. The date and time are displayed on the LCD.
  6. The microcode is loaded.
  7. The Test Mode LED is switched OFF.
  8. Within 10 seconds, the Ready LED is switched ON

Model Conversions

Model 001 or Model 002 to Model EXT. Model 001 and Model 002 can be made functionally equivalent to Model EXT by installing level 3.0 microcode or later.

Cables For 5494

72X5645  Cable Asm,Twinaxial Workstation Adapter (Ports 0-3)
03F0386  Cable Asm,Twinaxial Workstation Adapter (Ports 4-7)

Note: The Twinaxial Workstation Attachment cable connected to the lowest number slot supports twinaxial ports 0-3. The Twinaxial Expansion Adapter, if installed, supports twinaxial ports 4-7.

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Louis Ohland, Peter Wendt, William Walsh, Kevin Bowling, Jim Shorney, Tim Clarke, David Beem, Tatsuo Sunagawa, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 05 Mar 2021 - Changes & Credits | Legal Info & Contact