Honeywell SPZ-8000 Maintenance Manual page 85

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Pin Name
Remarks
JIA-C1l(H) Primary ASCB
JIA-C12(L) Clock
JIA-C14(H) Primary ASCB
JIA-C15(L) Data
JIA-H1(H) Primary ASCB
JIA-H2(L) Data without
line resistance
(external bus
couplers)
JIA-E13 ASCB Data Field
Select
JIA-E14 ASCB 2/4 Wire
Select
JIA-F1l(H) Secondary ASCB
JIA-F12(L) Clock
JIA-F14(H) Secondary ASCB
JIA-F15(L) Data
JIA-K1(H) Secondary ASCB
JIA-K2(L) Data without
line resistance
(external bus
couplers)
The IRU transmits and receives with this
port. Pins JIA-H1 and H2 are used when
the current limiting (short circuit
protection) resistors are placed
externally, as in the G-IV where they
are placed in the bus coupler. Refer to
Table 2-3 for 38words/transmit data
transmitted.
The IRU is capable of transmitting
either 23 words/transmission or 38
words/transmission based upon this
discrete. Ground this pin (short to
JIA-A1) for the 38-word transmission.
G-IV uses the 38-word transmission.
This discrete instructs the IRU whether
the installation uses a clock bus or
not. Ground this pin (short to JIA-Al)
for clockless. G-IV does not use clock
bus .
The IRU receives with this port. Pins
JIA-K1 and K2 are used when the current
limiting resistors are placed
externally. The LRUS received by the
primary and secondary ports are: bus
controllers 1, 2, and 3, FGCS 1 and 2,
and IRUS 1 and 2.
NOTE: The FGCS and the IRUS are only
received by IRU No. 3.
Inertial Reference Unit
Input/Output Information
.
Table 2-2
22-14-00
Page 104
Aug 15/91
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