Salter Brecknell 800 Series User Manual
Page 9
2.1.2 CONNECTING THE SERIAL PRINTER, REMOTE DISPLAY OR COMPUTER
The 800 series indicator comes standard with two serial ports, designated COM1 and
COM2. COM1 is a full duplex, RS-232 port designed for connection to either
a PC or a serial printer. COM2 is a simplex, RS-232 / Passive 20 mA Current
Loop port designed for connection to a remote display.
For indicators housed in an ABS enclosure, both COM ports are wired to one physical
connector, a DSUB9 female. As a result, you must use a “Y” interface cable
(not included) to gain access to COM2. Figure 2-4 shows the serial port
pinout. Refer to Appendix B for some suggested cable diagrams. (A 9-pin
pin Male D-type connector is required).
1. Plug the serial printer or computer communication cable (not included) directly
into the DSUB9 serial port connector or into the port labeled COM1 on the “Y”
interface cable.
2. Plug the remote display cable (not included) directly into the port labeled COM2
on the “Y” interface cable.
Pin No.
Pin Name
2
Receive Data
3
Transmit Data
4
Transmit Data
Port
COM1
Signal Level
RS-232
COM1
RS-232
RS-232
COM2
5
Signal Ground
RS-232
Both
7
CL +
20 mA
COM2
8
CL –
20 mA
COM2
2
3
5
4
8
7
Front View
Figure 2-4: Pin assignments for the DSUB9 serial port connector
2.1.3 CONNECTING THE POWER SUPPLY
1. The indicator ships standard with an internal AC to DC adapter. Simply plug the
AC line cord into a standard wall outlet.
2. If the indicator was shipped with the optional external AC adapter, simply plug
the AC adapter into the indicator’s DC Power Jack first, and then plug into a
standard wall outlet.
Make sure that the AC voltage appearing at the wall
outlet matches the input voltage marked on the AC adapter.