SF6 P2 Instrument User Manual V1.2
Unrivalled Gas Detect
ion.
Page 5 of 16
ionscience.com
Wiring
Mains power connects to the orange clamp block, according to the designation printed on the PCB
near each clamp.
For an optional audible and/or visible alarm device, a voltage free switchover relay output is supplied.
It is available on the blue 3 position clamp block in the middle. Contacts are, from left to right: N.O. /
COM / N.C.
During normal operation, COM connects to N.O. During an alarm or error condition, COM disconnects
from N.O. and switches over to N.C. The same applies in case of power failure, and whenever the
instrument is taken into setup mode via the host computer interface via the RS232 connector.
The leftmost 6 position clamp block is provided for network operation. Physically, the network follows
RS485 standards and hence has three wires named A, B, and GND. Their positions are marked on the
PCB next to the clamps. They must be wired to the corresponding pins on the SF6 NETWORKCONTROLLER P2NC.
Double clamps are provided for each wire for easy “daisy chaining” of several instrument.
RS 485 daisy chain PIN B
RS 485 daisy chain PIN A
RS 485 daisy chain PIN GND
Alarm Relay PIN
“Normally Open”
Alarm Relay PIN “Common”
Alarm Relay PIN “Normally Closed”
RS 232 Connector
Supply Voltage “EARTH”
Supply Voltage “L1”
Supply Voltage “N”
