Setting The End-Of-Line (Eol) Switch - Peak IOM57 Installation Instructions Manual

Setting the current loop jumper to the enabled position, as shown in Figure 10 connects an internal 100 ohm
resistor across the UI terminals, which maintains the 4 to 20 mA current loop circuit even when power to the
controller is interrupted or off.
IMPORTANT: Current loop jumpers must be in the disabled (default) position for all UIs that are not set up to
operate as 4 to 20 mA analog inputs.
The following table identifies the current loop jumpers that are associated with each UI on the IOM5711 controller.
Table 8: IOM5711 UI inputs and jumper labels
Universal input label
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
IN9
IN10
IN11
IN12
IN13
IN14
IN15
IN16

Setting the End-of-Line (EOL) switch

Each controller has an EOL switch, which when set to ON, sets the controller as a terminating device on the bus.
See the following figure for the EOL switch location. The default EOL switch position is Off.
To set the EOL switch on the controller, complete the following steps:
1. Determine the physical location of the controller on the SA or FC bus.
2. Determine if the controller must be set as a terminating device on the bus.
Note: The EOL termination rules for SA buses and FC buses are different. Refer to the MS/TP Communications
Bus Technical Bulletin (LIT-12011034) for detailed information regarding EOL termination rules and EOL switch
settings on SA and FC buses.
3. If the controller is a terminating device on the FC bus, set the EOL switch to ON. If the controller is not a
terminating device on the bus, set the EOL switch to Off.
When a controller is connected to power with its EOL switch set to ON, the amber EOL LED on the controller
cover lights up.
Jumper label on circuit board
J2
J3
J5
J6
J7
J8
J9
J10
J11
J12
J13
J14
J16
J17
J18
J19
Figure 11: End-of-Line switch positions
O
N
EOL ON Position
PEAK® IOM57 Input/Output Modules Installation Instructions
O
N
EOL Off Position
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