Serial Communications; Digital I/O; Analog Output; Analog Output Module Installation - Rice Lake 520 Installation Manual

2.3.2

Serial Communications

To attach serial communications cables, remove
connector J5 from the board. Connector J5 provides
connections for the EDP (Electronic Data Processing)
port, printer port, 20 mA current loop transmit signals,
and RS-485 signals. Table 2-2 shows the pin
assignments for connector J5.
Once cables are attached, reconnect J5 to the header
on the board.
T h e E D P p o r t s u p p o r t s R S - 2 3 2 o r R S - 4 8 5
communications; the printer port provides active 20
mA output and full-duplex RS-232 communications.
Both ports are configured using the SERIAL menu.
See Section 3.0 on page 14 for configuration
information.
Connector
J5
Table 2-2. J5 Pin Assignments
2.3.3

Digital I/O

Digital inputs can be set to provide many indicator
functions, including all keypad functions. Digital
inputs are active (on) with low voltage (0 VDC),
inactive (off) at 5 VDC. Use the DIG IN menu to
configure the digital inputs.
Digital outputs are typically used to control relays that
drive other equipment. Outputs are designed to sink,
rather than source, switching current. Each output is a
normally open collector circuit, capable of sinking
250 mA when active. Digital outputs are wired to
switch relays when the digital output is active (low, 0
VDC) with reference to a 5 VDC supply.
Use the SETPTS menu to configure digital outputs.
8 520 Installation Manual
Pin Signal
1 EDP TxD
2 GND
3 EDP RxD
4 Printer TxD
5 Printer RxD
6 –20 mA TxD
7 +20 mA TxD
8 RS-485A
9 RS-485B
10 GND
Table 2-3 shows the pin assignments for connector J4.
Connector
J4
Table 2-3. J4 Pin Assignments (Digital I/O)
2.3.4

Analog Output

If the optional analog output module is installed,
attach the output cable to connector J1 on the analog
output board. Table 2-4 lists the analog output pin
assignments.
Use the ALGOUT menu to configure and calibrate the
analog output module when cabling is complete. See
Section 2.4 for information about installing the analog
output module.
Pin
1
2
3
4
Table 2-4. Analog Output Module Pin Assignments
2.4

Analog Output Module Installation

To install or replace the analog output module, follow
the steps listed in Figure 2-2 on page 11 for opening
the 520 enclosure.
Mount the analog output module on its standoffs in
the location shown in Figure 2-4 on page 12 and plug
the module input into connector J2 on the 520 board.
Connect the output cable to the analog output module
as shown in Table 2-4, then reassemble the enclosure
(Section 2.5).
See Section 13.12 on page 78 for analog output
calibration procedures.
2.5

Enclosure Reassembly

Once cabling is complete, position the cover over the
enclosure and reinstall the cover screws.
Pin Signal
1 GND
2 DI1
3 DI2
4 DI3
5 DO1
6 DO2
7 DO3
8 DO4
9 GND
10 +5V
Signal
+ Current Out
– Current Out
+ Voltage Out
– Voltage Out