GE IC697BEM711 Bus Receiver (Required for Each Local Expansion Rack)
Features
High Speed Parallel Bus Expansion Interface
Supports up to seven Expansion racks
Supports Hold Last State
System Fault Isolation
Three LED indicators provide module, termination, and bus expansion port status
No DIP switches to set, easy software configuration into PLC system
Functions
This Bus Receiver Module (BRM) permits expansion
from the main rack to a maximum of seven additional
IC697 PLC racks with up to 50 feet (15 meters) total of
interconnecting cable.
The module occupies a single slot and has two connectors, one for attachment to the upstream or CPU rack
and the other for a daisy chained arrangement to additional expansion racks. The Bus Receiver Module must
always be installed in slot 1.
Three green LEDs provide status indication of module
status, rack activity status and presence of the I/O Bus
Terminator Plug (IC697ACC702) which is required in
the last rack.
The Bus Receiver Module supports hold last state operation of the output modules in the event of loss of
communications with the CPU. It also permits isolation and repair of a faulty module within a rack.
The BRM must be configured into the IC697 PLC system using the MS-DOS or Windows programming
software configuration function.
Installation
Installation should not be attempted without refer ring to the applicable Programmer Controller Installa tion Manual (see reference 3).
Make sure rack power is off.
Insert label inside module access door (see figure 2).
Install in slot 1 of the rack.
Select expansion rack ID on rack with BERG jump ers (see figure 1).
Turn on power.
Rack Number Jumpers
When the Bus Receiver Module is installed the remote
rack ID must also be set up. This is done with the
BERG jumpers located behind the power supply as
shown in figure 1. For more details, see Chapter 3 of
the Programmable Controller Installation Manual.
a42823
Figure 1. Rack Number Jumpers (Rack 2 Selected)
Terminator plug
The terminator plug which is supplied with each BRM
is only required in the last BRM in the chain as shown
in figure 2. It may be discarded or saved as a spare if
this BRM is not at the end of the chain.
If this BRM is at the end of the chain, the terminator
plug is installed in the lower expansion port, which is
labeled EXPANSION PORT OUT. The plug should be
secured with its attached screws.
Module Mechanical Keying
This module includes a mechanical key that prevents
inadvertent substitution of one module type for
another in a given slot. The key fits a uniquely
shaped area on the board below the connector. The
key is included with each module.
When the module is first installed, the key latches
onto the backplane center rail. When the module is
extracted, the key remains in the center rail, configur ing the slot to accept only identical module types.
Expansion Rack Attachment
Using cable IC600WDxxxA (where xxx is length in
feet as shown in figure 2) a Bus Transmitter Module
(BTM) in the CPU rack connects to a BRM in an ex pansion rack. Additional expansion racks are added
by daisy-chaining cabling between BRMs.
Removing a Module
The instructions below should be followed when re moving a module from its slot in a rack.
Grasp the board firmly at the top and bottom of
the board cover with your thumbs on the front of
the cover and your fingers on the plastic clips on
the back of the cover.
Squeeze the rack clips on the back of the cover
with your fingers to disengage the clip from the
rack rail and pull the board firmly to remove it
from the backplane connector.
Slide the board along the card guide and remove it
from the rack
Status Indications
The three green LEDs provide status information as
shown in figure 3. The top LED is ON when power is
applied, the rack is configured, there are no fatal
faults present in the rack and communications are
established with the CPU, and there is at least one
other module in the rack. The middle LED indicates
the presence of the terminator plug: ON is plug present. The bottom LED is on when the CPU is in run
mode and has communicated with this rack within
the last 500 milliseconds, otherwise it is off. When this
light is out the output modules go to their configured
fault state (either On or Hold Last State)