Detcon 700 Series Remote Sensor/Alarm Relay Module With HART Interface - Manual (Page 8)

700 HART-RAM I.M.
The user will typically connect the 700 Gas Sensor directly to the HART-RAM if there is no requirement for
remote sensor separation (Figure 6). In this case, the 700 sensor will not require its own junction box and it
is not necessary to install/use the transient protection module shipped with the 700 sensor. The 700 sensor
may arrive from the factory pre-assembled with the HART-RAM in the j-box, but only if it is ordered in this
configuration. In this configuration, the wires from the 700 sensor will be directly connected to the 6-pin
terminal block labeled “SENSOR” on the terminal board.
NOTE: If the 700 sensor and HART-RAM are directly connected, it is not necessary to
install/use the transient protection module that is shipped with every 700 Gas Sensor.
Sensor
Power Input
mA/HART Output
Modbus ™ Interface
Fault
Annunciator
Alarm 1
Annunciator
Alarm 2
Annunciator
PGM2
SPAN
detcon inc.
MODEL
XX-700
PGM1
ZERO
Figure 6 Installation with 700 Gas Sensor
If remote sensor separation is required, the HART-RAM will be separated from the 700 sensor. Remote
separation distances of up to 1000 feet are possible with the recommended cables.
NOTE: It is highly recommended to install the interconnecting cabling inside rigid metal
conduit to eliminate potential EMI and RFI interference.
mA/HART Output
700 HART-RAM
Module
Cabling to/from Remote
700 Series Sensor
Remote 700
Series Sensor
Transient Protection
Module in Detcon
standard J-Box
Power Input
Sensor
detcon inc.
MODEL XX-700
PGM1
ZERO
PGM2
SPAN
Modbus ™ Interface
Power & Modbus ™
Figure 7 Remote 700 Gas Sensor with HART-RAM
700 HART-RAM I.M. Rev. 0.0 Page 4 of 24