ROC364 Instruction Manual
3-24 Input and Output Modules Rev Jun/05
3.5.3 Discrete Input Source Module
Equipment Required: Jumper wire
1. Place a jumper across terminals B and C.
2. The LED on the module should light and the Status as read by ROCLINK configuration software
should change to “On.”
3. With no jumper on terminals B and C, the LED should not be lit and the Status should be “Off.”
4. If the unit fails to operate, make sure a correct value for the module resistor is being used.
3.5.4 Discrete Input Isolated Module
Equipment Required: Voltage generator capable of generating 11 to 30 volts dc
Personal Computer running ROCLINK configuration software
1. Supply an input voltage across terminals B and C.
2. The LED on the module should light and the Status as read by ROCLINK configuration software
should change to “On.”
3. With no input on terminals B and C, the LED should not be lit and the Status should be “Off.”
4. If the unit fails to operate, make sure a correct value for the module resistor is being used.
3.5.5 Discrete Output Source Module
Equipment Required: Multimeter
Personal Computer running ROCLINK configuration software
1. Place the Discrete Output in manual mode (Scanning Disabled) using ROCLINK configuration
software.
2. With the output Status set to “Off,” less than 0.5 volts dc should be measured across pins B and
pin C.
3. With the output Status set to “On,” approximately 1.5 volts dc less than the system voltage
(V
s
–1.5) should be measured across terminals A and B.
4. If these values are not measured, check to see if the module fuse is open, verify the module is
wired correctly, and verify the load current requirement does not exceed the 57-milliamps
current limit value of the module.
3.5.6 Discrete Output Isolated Module
Equipment Required: Multimeter
Personal Computer running ROCLINK configuration software
1. Place the Discrete Output in manual mode (Scanning Disabled) using ROCLINK configuration
software.
2. Set the output Status to “Off” and measure the resistance across terminals A and B. No
continuity should be indicated.
3. Set the output Status to “On” and measure the resistance across terminals A and B. A reading of
15 kilohms or less should be obtained.
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