13
BCD Option
13-1
13.1 FEATURES OVERVIEW
1. 6 BCD digits (24 lines plus 1 polarity, 3 decimal-point location code, 1
overflow, 1 timing, 1 control, 4 card address, and 3 isolation power
lines).
2. Furnished 40-line mass-terminated connector: pin compatibility with 50-
pin BCD cable assignments.
3. Can be jumpered for internal, non-isolated drive or external power with
isolation (354 V per IEC spacing, 500 V test).
4. Upper 3 BCD digits can be multiplexed onto lower 3 BCD lines for 3
digits at a time readout.
5. All outputs tri-state, TTL/CMOS compatible, 10 LSTTL loads.
6. Data always valid (stored, buffered).
7. Selectable 4-line card address (with internal pull-ups) or single-line
activation.
Figure 13-1 shows the rear of the meter case with the 40-line edge
connector highlighted and the upper and lower pin assignments.
Figure 13-1. BCD 40-Pin Cable Connector (P8)
D.P. 2
D.P. 4
D. P. 1
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