Detcon 700 Series Remote Sensor/Alarm Relay Module With Profibus DP Interface - Manual (Page 5)

700 Profi-RAM
1. Introduction
1.1 Description
The Model 700 Remote Sensor/Alarm Relay Module with Profibus Interface (known as the Profibus Remote
Alarm Module or Profi-RAM) is sold separately as an accessory for Model 700 Series Gas Sensors. It is a
universal design and can be used with any of the Model 700 Gas Sensors. The Profi-RAM is provided in an
explosion-proof junction box constructed of either epoxy-painted aluminum or 316 stainless steel.
Figure 1 700 Profi-RAM
The Profi-RAM performs three functions. The first function is used to set gas alarm levels and to configure
the three local relay contacts. The second function is to provide a Profibus Interface for the Model 700 Gas
Sensor and the third is to operate the Model 700 Gas Sensor remotely. The remote sensor function is typically
used when the sensor must be mounted in a position where it cannot be viewed or accessed readily. Both
functions can be used at the same time.
The RAM Module provides a bridge for a Model 700 gas sensor to a PROFIBUS-DP Network. The Profi-
RAM functions as an intelligent PROFIBUS-DP Slave on the Network. The Profi-RAM also provides
connection directly to the 4-20mA output of the Model 700 Gas Sensor.
1.2 Installation
The Profi-RAM can be installed as a wall mount or pipe mount using the mounting holes of the explosion-
proof junction box. It should be oriented such that the LED display is horizontal. If the 700 Gas Sensor is
mounted directly to the Profi-RAM, use 0.5” spacers underneath the mounting holes to provide access
clearance for the 700 Gas Sensor (
). Figure 3
NOTE: Block any unused ¾” NPT holes with the proper Plug. (Detcon P/N 8522-750)
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