46112/113-0299 <90-00032>
P
AGE
11
INSTALLATION
I
nstallation consists of setting the straps and switches, wiring
the pin connectors, and mounting the module in the shelf.
1. Set the 46112
SynchMaster Module straps.
Refer to Fig. 7. Each 46112 SynchMaster Module has two
2-position strapping points that configure the line clock polarity.
The first two points are TXCPOL and RXCPOL. When in the
POS position, data changes at the rising edge of the clock pulse.
When in the NEG position, data changes at the falling edge of
the clock pulse.
Set the RS-422 Interface Subassembly straps. Refer to Fig. 7.
When you place the straps in the “T” position a terminating
resistor connects across the RS-422 differential inputs. When
you place the straps in the “O” position you do not connect the
terminating resistor.
2. Set the 46113
SynchMaster Module straps.
Refer to Fig. 8. The 46113 SynchMaster Module has four
3-position strapping points that allow terminating resistors for
use on the receiver circuits. The resistors are labeled TRMA,
TRMB, TRMC and TRMD.
♦
When placed in the “T” position, the terminating resistor
connects across the RS-422 differential inputs.
♦
When placed in the “O” position, the terminating resistors do
not connect.
♦
To prevent a misleading front panel indicator, place in the
“G” position for all applications except those using RS-422.
3. Set the 46113
SynchMaster Module switches.
The 46113 SynchMaster Module is the only module with
switches. Refer to Fig. 8, Table A, and Table B.
There is a maximum of 32 time slots available in a
SynchMaster system. The baud rate of the equipment utilizing
any one port determines how many time slots that port requires.
The higher the baud rate, the more time slots it will need. Table
C shows the relationship between baud rate and time slots
(addresses).
Table D depicts a sample system and shows the relationship
between addresses used and baud rates.
Table E is included for your use.
N
OTE
:
Use factory-set strapping
options. Change the strapping
options only for special applica-
tions.
CONTINUED
. . .
UPDATED
