5
3.1 POWER WIRING
USR COMM
US
R
+9-28 VDC
TC
-
TC
+
PWR COMMON
+
-
DC Power
+9 to +28 VDC: +VDC
Power Common: -VDC
3.2 USER INPUT WIRING
USR COMM
US
R
+9-28 VDC
TC
-
TC
+
PWR COMMON
Sinking Logic
USR COMM
USR
The user input of the meter is
internally pulled up to +9 to +28 V
with 10 K resistance. The input is
active when it is pulled low (<0 .7 V).
Connect external switching device between the
User Input terminal and User Input Common.
}
3.3 INPUT WIRING
3.4 SETPOINT (OUTPUT) WIRING
COM
N.C.
N.O.
SINGLE SETPOINT RELAY PLUG-IN CARD
COM
N.O.
N.C.
ELECTRICAL CONNECTIONS
DUAL SETPOINT N-FET OPEN DRAIN PLUG-IN CARD
OSNK1
OSNK2
COM
Thermocouple
-
+
TC
-
TC
+
CAUTION
: Power input common and sensor input common are NOT isolated
from user input common. In order to preserve the safety of the meter
application, the power input common and the sensor input common must
be suitably isolated from hazardous live earth referenced voltages; or input
common must be at protective earth ground potential. If not, hazardous live
voltage may be present at the User Inputs and User Input Common
terminals. Appropriate considerations must then be given to the potential
of the user input common with respect to earth common; and the common
of the isolated plug-in cards with respect to input common.
COM
OSNK 1(2)
(30 V MAX.)
ELECTRICAL CONNECTIONS
Output Common is not isolated from DC Power Common. Load must
be wired between OSNK terminal and V+ of the load supply.
3.5 SERIAL COMMUNICATION WIRING
N/
C
RS485
2
COMM
A+
B-
N/
C
5
3
4
N/
C
RS232
5
N/
C
TX
N/
C
4 3
COMM
COMM
2
RX
6
1
6
1
3.6 USB PROGRAMMING
USB PROGRAMING PLUG-IN CARD
SERIAL COMMUNICATIONS PLUG-IN CARD
RJ11 CONNECTOR PIN OUTS
