Detcon 700 Series Remote Sensor/Alarm Relay Module With Profibus DP Interface - Manual (Page 9)

700 Profi-RAM
NOTE 3: The same recommended cables should be used for the connection between the
master control device and the Profi-RAM. However, if only the 4-20 mA signal is being used
by the master/host controller then only the 3 wire cable is required.
2. Operator Interface
The operator interface of the Profi-RAM is very similar to the Model 700 Gas Sensor. It uses the identical
LED display, same programming magnet, and has the same magnetic programming switches (PGM1/ZERO
and PGM2/SPAN). The main difference is that the 700 Profi-RAM has LED indicators for the 3 relays
(ALM1, ALM2, and FAULT) and a CAL LED to indicate when the 700 sensor is in calibration.
The gas reading, gas units, and fault status reported by the Profi-RAM will mimic that of the 700 Gas Sensor.
NOTE: If the Model 700 Gas Sensor is directly connected to the Profi-RAM and junction
box, then the gas sensor operation should be exercised through the 700 Gas Sensor (and not the
Profi-RAM). This is the recommended practice since the Profi-RAM contains a limited
number of sensor operational control functions. If the Profi-RAM and 700 Gas Sensor are
separated, normal remote gas sensor operation should be exercised through the Profi-RAM.
The operating interface is menu-driven via the two magnetic program switches located under the target marks
on the Profi-RAM faceplate. The two switches are referred to as “PGM1” and “PGM2”. The menu list
consists of three major items that include sub-menus as indicated below. (Refer to the complete Software
Flow Chart.)
Normal Operation
Current Reading and Fault Status
Calibration Mode
AutoZero (if applicable)
AutoSpan
Program Mode
View Sensor Status (representative of whichever Model 700 Gas Sensor is attached)
Set AutoSpan Level
Set Serial ID
Alarm 1 Settings
Alarm 2 Settings
Fault Settings
Signal Output Check
PDP Diagnostics
The user interface of the Profi-RAM is designed to mimic that of the Model 700 Gas Sensor. However, only
the functions deemed critical for normal remote sensor operation are available. These are the 6 menu
functions that are available for the remote control of the 700 Gas Sensor:
AutoZero – used to perform AutoZero remotely
AutoSpan – used to perform AutoSpan remotely, user is required to apply span gas flow to remote gas sensor
View Program Status – displays the complete list of sensor status and diagnostic indicators
Set AutoSpan Level – used to change the span gas concentration
Signal Output Check – used to generate simulated outputs from the sensor for system diagnostic purposes.
PDP Diagnostics – Displays the Profibus DP slave’s status.
Profibus RAM I.M. Rev. 0.3 Page 5 of 14