Instruction manual

361T
DENSITOMETER
6-1
6. Serial Interface
Interconnect and Definition
The 25-pin connector used for serial input/output is a DB25S type.
Below is the connection diagram.
361T
DB25S
TYPICAL
COMPUTER
W/DB25
Frame Ground 1 —Signal Direction— 1 Frame Ground
Transmitted Data 2 ———————— 3 Receive Data
Received Data 3 ———————— 2 Transmit Data
RTS 4 ———————— No Connection
Pin 5 5 ———————— 4 RTS or DTR (20)
DSR 6 ———————— No Connection
Ground 7 ———————— 7 Ground
DTR 20 ———————— 6 DSR or CTS (5)
Pin # Term Definition
2 Transmitted Data – Data transmitted from the densitometer
with parameters (baud rate, format) set by the densitometer.
3 Received Data – Data received by the densitometer from
outside source using the same parameters as the densitometer.
4 RTS (Request To Send) – Logic 0 only.
5 PIN 5 – if set to CTS = Logic 0 active, if set to BUSY = 1
active, and if set to OFF = IGNORE.
6 DSR (Data Set Ready) – Logic 0 active.
20 DTR (Data Terminal Ready) – Logic 0 active (On Line) and
Logic 1 during: Power Off, Power Up, Self Test, during
measurements, and when service RCI.
Note: Logic 1 = +.8VDC to –25VDC
Logic 0 = +2.25VDC to +25VDC