UN23013s UN23!13s
UN230136 UN23!136
UN230137 UN23!137
UN230138 UN23!138
UN230139 UN23!139
UN230140 UN23!140
UN230141 UN23!141
UN230142 UN23!142
miscellaneous control switching logic associated with the
Control Panel. Power requirements +12V. 4U unsupported
card.
Parent
equipment
EP10M!sOI.
DD
1980.
DDMI
7.467(81).
Events Control Logic Unit. Used in the GE2M!14.
miscellaneous logic and interface functions.
requirements +12V. 4U unsupported card. DD 1980.
7.468(81).
Performs
Power
DDMI
Playback Machine Control Panel Logic. The unit is used in
the Playback Machine Control Equipment EP10M!s02. It
contains miscellaneous Control Switching logic associated
with the Control Panel. Power requirements +12V. 4u BMM
unsupported card. DD 1980. DDMI 7.463(81).
Splice and End of Tape Detector (Optical). This printed
circuit board is mounted on the tape transport desk of the
EP1!17 tape reclamation equipment. It carries the optical
splice and end of tape detector to provide the control
logic output associated with these funcions. It also
carries the current sense resistors for the erase and
record head and the bias adjustment control. Power
requirements +sV at 10mA. Printed circuit board
approximately 100mm x 30mm. DD 1980.
BBC 280 Bus Extension System. This unit consists of two
UN26!47 connected together via two 40-way ribbon cables.
It is used to interconnect two separate 4U crates, one of
which contains a CPU. Each UN26!47 can be designated as
'master' (with CPU), or 'slave' (without CPU). Full bus
control (including DMA) is possible from either the master
or slave crate. Connection of the SV and !12V is optional
via 'handbag' links. Power requirements SV (provided by
the bus).
4U unsupported card.
Sub-unit UN26!47.
DD
1981. DDHB 8.384(82).
Palantype Keyboard Buffer
through-hole-plated PCB
buffers for Palantype
requirements SV at SOmA.
300mm. DD 1981.
Logic. The unit consists of a
which carries tri-state CMOS
keyboard switching. Power
Printed Circuit Board 130mm x
Clean Feed Switching Control Unit. An unsupported 4U card
mounting the control logic for driving the Clean Feed
Switching of the London Continuity EP10!19. Power
requirements !6 volts. 4U BMM. Parent equipment EPsM!18.
DD 1981. DDMI 3.705(82).
Output Switching Control Unit. An unsupported 4U card
mounting the control logic for driving the output switching
of the London Continuity EP10!19. Power requirements !6
volts, -50 volts. 4U BMM card. Parent equipment EPsM!17.
DD 1981. DDHB 3.270(82).
Transcoder Control Unit. Provides local push-button
control of main Transcoder function, and includes logic for
remote control. Also provides outputs to Monitoring System
to indicate Transcoder operating mode. Power requirements
317

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