Model LI1X Universal Process Meter
Instruction Manual
Model LI1X Universal Process Meter
Instruction Manual
Relays & 4-20 mA Output
Depending on the model number, the Options PCB may contain two
or four relays and an Isolated 4-20 mA Transmitter Output. Relay con-
nections are made to removable screw terminal connectors located at
J2 and J3 on the Options PCB. Connections for the Isolated 4-20 mA
Transmitter Output are made to J1 on the Options PCB.
Figure 8: Option Card Pinouts
Notes:
1.
Alarm acknowledgement terminals (ACK and COM) are located on
the meter main board.
2. In the alarm condition, the NC contact is connected to common in
the fail safe mode.
Figure 9: Rear View of Meter (Connectors)
DC Powered Meters (Power, Signal, External Functions)
Figure 6: Transmitter and Meter Powered from Same DC
Power Supply
Figure 7: Transmitter and Meter Powered from
Separate DC Power Supplies
14
15
24 VDC
Power Supply
4-20 mA
Transmitter
–
– +
+
3 2 1
V- V+
S- S+ C
O
M
H
L
D
A
C
K
*For signal/power isolation seperate
power supplies are required.
Signal Input
Selection
Array
Lockout
Jumper
Loop
Power Supply
4-20 mA
Transmitter
–
–
+
+
3 2 1
Signal Input
Selection
Array
Lockout
Jumper
24 VDC
V- V+
S- S+ C
O
M
H
L
D
A
C
K
Relay #1 Common
Relay #1 NC
Relay #1 NO
Relay #2 Common
Relay #2 NC
Relay #2 NO
Relay #3 Common
Relay #3 NC
Relay #3 NO
Relay #4 Common
Relay #4 NC
Relay #4 NO
Function:
Trans
Transmitter -
Pin:
1
2
3
4
5
6
1
2
1
2
3
4
5
6
J1
J2
J3
AK
H
S
S
P
P
L
L
+
+
-
-
-
+
J3
J2
J1
6
5
4
3
2
1
6
5
4
3
2
1
CM
Spec Tech Industrial Electric
www.spectechind.com
888-773-2832
Spec Tech Industrial Electric
www.spectechind.com
888-773-2832
