17 Jun
2013
17 Jun
'13
8:22 p.m.
On Jun 17, 2013, at 12:07 PM, ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Duh! That's the difference between the different models of DZ11. The
DZ11-C and the DZ11-F have two boards (M7819 and M7814 respectively).
I should have said "A distribution panel supports 16 lines, so given that
each board provides only 8, 2 boards are required for the full 16 lines."
Geez. Typo.
TTFN - Guy
DZ11 comprises
a number of different boards and distribution panels.
Sure. All the electronics, including the conversion form TTL levels to
RS23 or current loop, is on the Unibus card. In soem ways that's a pity,
I would have prefered a board that sent out TTL levels and which was
converted to RS22/20mA loop o nthe distribution panel. But anyway...
A distribution panel supports 16 lines, so 2
boards are required.
Not strictly 'requried' You can link the appropriate distribution panel
to just one board. Only half the conenctors are then used for anything,
but it will work. If you only need 8 lines, for example...
The EIA (RS232) version is M7819 with an H317E distribution panel.
The 20ma version is M7814 with an H317F distribution panel.
DZ11-A is an EIA version with a distribution panel. DZ11-B is just the
M7819 and requisite cables. DZ11-C is a DZ11-A *and* a DZ11-B.
DZ11-C is the 20ma version with a distribution panel. DZ11-D is just
Come again? You have the DZ11-C as the 16 line RS232 and the 8 line
current loop. Surely not? the M7814 and cables. DZ11-E is a DZ11-C *and* a
DZ11-D.
Substituting one distribution panel for another will not get you the results
you want.
True.