Rice Lake 120 Plus Digital Weight Indicator - Manual (Page 11)

Installation 7
2.0 Installation
This section provides information for connecting the indicator to load cell digital inputs and outputs, and serial
communications cables. Battery installation is also described in this chapter in Section 2.5.
To power up the 120 Plus indicator, press the ZERO key on the front panel. The indicator must be installed near an
easily accessible power source or can be operated on an internal battery.
The various sockets on the 120 Plus are shown in Figure 2-1.
Figure 2-1. 120 Plus Cable Connections
2.1 Power Connector
The following table details the power connector pin functions.
2.2 Serial/Print Connector
Table 2-2 details the serial pin connector functions:
The RS-232 EDP port (RS-232C, may be connected to a PC, printer, or remote display) and the printer port (TxD
20 mA, may be connected to a PC, printer or remote display). Connections are shown in Figure 2-2.
Figure 2-2. Connect RS-232 EDP Port to PC
Pin Designation Function
1 DC+ Power Source
2 DC- Power Source
3 Earth Power Return
Table 2-1. Power Connection Pin Outs
Port Pin Designation Function
EDP Port 2 EDP TxD RS-232 Transmit Data
6 EDP RxD RS-232 Receive Data
12 EDP GND RS-232 Ground or -20 mA Out
Print Port 1 PR: TxD RS-232 Transmit Data
11 PR: TxD 20 mA + 20 mA Out
12 PR: -20 mA OUT RS-232 Ground or -20 mA Out
Table 2-2. Serial Connector
Load Cell
1
2
3
PC COM1
6
2
12
DB9-F
5 2 3
TxD RxD
TxD RxD
GND
HDB15
120 Plus