15
REAR CONNECTIONS FOR HI 8931
• Power Connection Terminals
4-screw-terminal-strip for connection
to a 3-wire power cable according to
the indicated voltage (115 or 230V).
• DIN connector socket
For connection of the
HI 7638
conductivity probe.
• IN/OUT Transmitter
2 wires of the 4-core signal cable from
the conductivity transmitter (
HI8936
)
have to be connected to the mA input ter-
minals (7, 8) by paying attention to the
polarity and the other 2 wires to the
"
+20 V
" and "
COM
" while paying
careful attention to the polarity (5, 6).
+20 V supply
is the regulated DC supply required for the operation
of the external conductivity transmitter HI 8936.
Note:
Only one of DIN or input transmitter connectors can be used at a
moment. Leave unconnected the unused input.
• Set Contacts
Dosing pumps or other control equipment
may be connected to the "SET" (Max. 2A,
240 V) terminals (1, 2). These contacts act
only as a "dry" switch allowing electrical
continuity, not as a power supply.
CONNECTIONS
CONNECTIONS
CONNECTIONS
CONNECTIONS
CONNECTIONS
