GFK-1504N
Chapter 6 Expansion Modules
6-15
6
IC200ERM002: Expansion Receiver Module, Non-isolated
Connectors
The Expansion Receiver has two 26-pin female D-shell expansion ports. The
upper port receives the cable from an Expansion Transmitter or upstream
Expansion Receiver Module. The lower port is used to connect the expansion
cable to the next expansion rack or to attach the terminator plug at the last rack.
Expansion Rack
Selection Switch
LEDs
Expansion Port for
Incoming cable
Expansion Port for
Continuing Cable or
Termination Plug
5
7
6
4
1
3
2
ERM002
PWR
EXP RX
SCAN
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EXP 1
EXP 2
0
LED Indicators
Three LEDs display the status of module power, the expansion port, and the I/O
modules.
The PWR LED is ON when the module is receiving 5 V DC power from the
attached power supply. It is OFFwhen there is no power supply attached or
when the power supply itself is not receiving power.
The SCAN LED lights green when the CPU/NIU is actively scanning I/O in
expansion racks. It lights amber when the CPU/NIU is not actively scanning I/O
in expansion racks.
The EXP RX LED indicates the status of the expansion bus. This LED is either
blinking or ON when the Expansion Receiver is communicating with the
Expansion Transmitter or with other ERMs. It is OFF when not communicating.
Expansion Rack Selection Switch
The Rack Selection Switch is used to specify in which expansion rack the ERM
is.
