Red Lion CUB5T - Manual (Page 5)

5
4.1 POWER WIRING
INP COMM USR
+9-28 VDC
INP B INP A
PWR COMMON
+ -
DC Power
+9 to +28 VDC: +VDC
Power Common: -VDC
4.2 USER INPUT WIRING
INP COMM USR
+9-28 VDC
INP B INP A
PWR COMMON
Sinking Logic
INP 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.
Connect external switching device between the
User Input terminal and Input Common. }
4.3 INPUT WIRING
CAUTION: Power input common is NOT isolated from user input common. In order to preserve the safety of the meter application, the power input
common must be suitably isolated from hazardous live earth referenced voltage; or input common must be at protective earth ground potential. If not,
hazardous 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 ground; and the common of the plug-in cards with respect to input common.
+9-28 VDC PWR COMMON
INP COMM USR INP A INP B
O.C.
NPN
INP B INP A INP COMM USR
+9-28 VDC PWR COMMON
Interfacing With TTL Current Sinking Output
Input A
Switch or Isolated Transistor; Current Sink
Input A
+9-28 VDC PWR COMMON
USR INP COMM INP B INP A
COMMON
+5 V
4.4 SETPOINT (OUTPUT) WIRING
4.5 SERIAL COMMUNICATION WIRING
COM
N.C.
N.O.
COM N.O. N.C.
ELECTRICAL CONNECTIONS SETPOINT RELAY PLUG-IN CARD
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
SERIAL COMMUNICATIONS PLUG-IN CARD
RJ11 CONNECTOR PIN OUTS
Input A