46112/113-0299 <90-00032>
P
AGE
5
46113
SynchMaster D
ATA
P
ORT
M
ODULE
The 46113 SynchMaster Data Port Module consists of:
RS-232 and RS-422 Drivers and Receivers
The RS-232 and RS-422 drivers and receivers transmit and
receive drop side data in their respective formats. The receivers
transform the data to the TTL levels for use by the UARTs.
Terminating Resistors
The RS-422 inputs have strap enabled terminating resistors that
operate the same as the 46112 SynchMaster module terminat-
ing resistors. T = terminate; O = open.
UARTs
The UARTs (Universal Asynchronous Receiver/Transmitters)
convert the drop side serial data to a parallel data format and
send and receive data to and from the 46112 SynchMaster
module.
The UARTs also control the serial data format (including baud,
number of data and stop bits, and so on). DIP switches set the
serial data format. The serial data format controls 46112
SynchMaster module programming (at initial power-up) for
each UART which determines each port’s data format.
Configuration Switches
The 46112 SynchMaster module’s microprocessor reads con-
figuration switches which programs the 46113 SynchMaster
module’s UARTs. The switches determine the operating mode,
the number of data and stop bits, the parity and the baud (data
transmission) rate and set the channel number.
Status Indicating LEDs
There are two sets of four green front panel LEDs.
The top four LEDs are labeled TXD (ports A to D) and light up
when the port (A, B, C or D) drop side equipment transmits data
through the 46113 SynchMaster module.
The bottom four LEDs are labeled RXD (ports A to D) and light
up when the port (A, B, C or D) receives data from a remote
46113 SynchMaster module and transmits the data to the drop
equipment
A Power Regulator
The regulated power supply operates on -21 to -56 VDC and
supplies operating power for the 46113 SynchMaster module’s
circuits. The power supply also supplies reg5 VDC
output power (through edge connector pin 22) for operating the
46112 SynchMaster module’s circuits.
N
OTE
:
To leave a port unused (inactive),
place all configuration switches
for that port in the ON position
and set the port to an unused
channel number. Failure to do so
will result in all ports operating
sporadically.
CIRCUIT DESCRIPTION
