Red Lion LDA - Manual (Page 4)

4
3.4 INPUT WIRING
3.2 USER INPUT WIRING
CAUTION: Analog common is NOT isolated from user input
common. In order to preserve the safety of the meter application,
the DC 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 Input and Input Common terminals. Appropriate
considerations must then be given to the potential of the input
common with respect to earth ground. Always connect the
analog signal common to terminal 2.
The User Input is located: LD2 - left side, LD4 - right side
Terminal 5: User Input
Terminal 6: User Comm
3.3 SETPOINT (OUTPUT) WIRING
The setpoint relays use a six position terminal block (TBB) located inside the
(right side).
Terminal 1: NC 1
Terminal 2: NO 2
Terminal 3: Relay 1 Common
Terminal 4: NC 1
Terminal 5: NO 2
Terminal 6: Relay 2 Common
USER 5
USER COMM 6
TBC
USER
USER COMM 6
5
TBC
+
-
1 N.C. 1
COMM 1 3
2 N.O. 1
TBB
4
5
6
N.C. 2
N.O. 2
COMM 2
Sinking Logic Sourcing Logic
USER/EXC. COMMON
USER INPUT
VOLT INPUT
INPUT COMMON
CURRENT INPUT
+24 VDC EXC.
TBC
6
2
4
5
3
1
200 MV/2 V
200 µA
2 MA
20 MA
200 MA
20 V/200 V
10 V
Current Signal
(self powered)
Terminal 3: +ADC
Terminal 2: -ADC
Voltage Signal
(self powered)
Terminal 1: +VDC
Terminal 2: -VDC
Current Signal (2 wire
requiring excitation)
Terminal 4: +EXC
Terminal 3: +ADC
1 2
+ -
200 VDC MAX.
VO
LT
ANALOG COMM
3.5 INPUT SIGNAL WIRING
Current Signal (3 wire
requiring excitation)
Terminal 3: +ADC (signal)
Terminal 2: -ADC (common)
Terminal 4: +EXC
Voltage Signal (3 wire
requiring excitation)
Terminal 1: +VDC (signal)
Terminal 2: -VDC (common)
Terminal 4: +EXC
Load
200 MA DC MAX.
ANALOG COMM CURRENT
2
+ -
3
3 WIRE TRANSMITTER
VO
LT
1
+ EXC
.
ANALOG COMM
I out V out
2
COMM
3 4
CURRENT
TRANSMITTER - +
+ EXC
.
CURRENT
3
2 WIRE
4
Before connecting signal wires, the Input Range Jumper should be verified
for proper position.