Rice Lake 720i Programmable Indicator/Controller - Installation Manual - Manual (Page 14)

8 720i Installation Manual
An optional dual-channel serial communications
expansion card, PN 67604, is also available. The serial
expansion card provides two additional serial ports,
assigned as port numbers 7 and 8. One port on the
serial expansion card supports four-wire RS-485
communications. Both ports on the expansion card can
support RS-232 or 20mA connections.
Note
Installation of option cards in connector J11
requires removal of the PORT2/OPTI port
selection jumper (see Figure 2-3 on page 9).
Install the jumper to enable RS-232
communications through connector J2;
remove the jumper to enable an USB,
fiber-optic, or Ethernet option card installed in
connector J11.
See the communications interface card installation
instructions for more information.
2.3.4 Digital I/O
Digital inputs can be set to provide many indicator
functions, including all keypad functions. Digital
inputs are active low (0 VDC), inactive high (5 VDC).
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 24
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.
Table 2-3 shows the pin assignments for connector J6.
Table 2-3. J6 Pin Assignments (Digital I/O)
J6 Pin J6 Signal
1 +5 VDC
2 GND
3 DIO 1
4 DIO 2
5 DIO 3
6 DIO 4
7 DIO 5
8 DIO 6
9 DIO 7
10 DIO 8
Digital inputs and outputs are configured using the
DIG I/O menu. See Section 3.2.5 on page 43 for
configuration information.
An optional 24-channel digital I/O expansion card, PN
67601, is available for applications requiring more
digital I/O channels.
Note
A digital I/O point can be configured to count
active pulse inputs by setting the bit to INPUT
(DIG I/O menu) and using
PCEE to monitor the
bit. However, the fastest pulse rate that can be
counted using a digital input is 10Hz (10 pulses
per second).
2.3.5 Detached Display Module (DDM)
Table 2-4 shows the connections between connector J4
on the
720i CPU board and connector J3 (Com 1) on
the detached display module (DDM) board. See board
diagrams in Figures 2-3 and 2-4, on page 9.
Table 2-4. CPU Board—DDM Connections
DDM Com 1
J3 Connector
CPU Board
J4 Connector
Pin Signal Pin Signal
1 A 1 Y
2 B 2 Z
3 Z 3 B
4 Y 4 A
5 +6V 5 +6V
6 GND 6 GND
2.4 Installing Option Cards
E a c h o p t i o n c a r d i s s h i p p e d w i t h i n s t a l l a t i o n
instructions specific to that card. The general procedure
for all option cards is as follows:
CAUTION
Option cards are not hot-pluggable.
Disconnect power to the
720i before
installing option cards.
1. Disconnect power to the indicator. Remove
backplate as described in Section 2.2 on
page 6.
2. Carefully align the option card connector with
connector J12 or J11 on the CPU board (see
Figure 2-3 on page 9). Press down to seat the
option card in the CPU board connector.
3. Use the screws provided in the option kit to
secure the other end of the option card to the
threaded standoffs on the CPU board (see
Figure 2-3).
4. Make connections to the option card as
required. Use cable ties to secure loose cables
inside the enclosure. When installation is
c o m p l e t e , r e a s s e m b l e t h e e n c l o s u r e a s
described in Section 2.6 on page 10.
The 720i automatically recognizes all installed option
c a r d s w h e n t h e u n i t i s p o w e r e d o n . N o
hardware-specific configuration is required to identify
the newly installed card to the system.