Analog Signal Input Wiring (4-20 Ma, 1-5 Vdc, And Mv) - Siemens Moore 353 User Manual

UM353-1

8.4.2 Analog Signal Input Wiring (4-20 mA, 1-5 Vdc, and mV)

Moore 353 analog signal input terminals are connected to software function blocks AIN and AINU within the
controller. Table 8.1 correlates function blocks and input terminals. These terminals will accept several input
signal types with the appropriate wiring and components. A current input signal to an AIN or AINU function block
must be converted to 1-5 Vdc by a range resistor.
INPUT TYPE
4-20 mA
1-5 Vdc
Millivolt
Notes:
(1) Function blocks AIN4, AINU1, and AINU2 are available only when an I/O Expander Board is
installed.
(2) Range resistors listed are supplied in Installation Kits. For other current values, select a range
resistor that will provide a 1-5 Vdc input. For example, for 10-50 mA, install a 100Ω range
resistor.
Crimp-on connectors are provided for use when a range resistor and a signal input wire are to be inserted in the
same connector terminal. A connector should also be used when two wires of significantly different gauges would
otherwise be inserted in a single connector terminal.
Perform the following steps for each analog input.
1. Select an analog input terminal pair for connection of the input signal wiring. Refer to Table 8.1 and the
following illustrations as necessary.
For a 4-20 mA input, go to step 2. For a 1-5 Vdc or millivolt input, go to step 4.
External Device
Analog Signal,
+
e.g. Model 340 or
SITRANS P DSIII,
_
2-Wire Transmitter,
4-20 mA Output
X03107S3
Earth
Ground
A. Controller Powered
FIGURE 8-9 Analog Input AIN1, 2-Wire Transmitter
March 2003
(1)
FUNCTION BLOCKS
AIN1-4
AINU1 and 2
AIN1-4
AINU1 and 2
Model 353
Rear Terminals
_
26 Vdc
+
5
6
1-5 Vdc
20
18
250
Common Ground Bus
Note: See Table 8.1 for AIN2,
3, and 4 terminals.
(2)
RANGE RESISTOR
250Ω
3.75Ω
Not Required
Not Required
External Power Supply
_
26 Vdc Typical
+
External Device
Analog Signal,
+
e.g. Model 340 or
SITRANS P DSIII,
_
2-Wire Transmitter,
4-20 mA Output
MG000651a
Earth
Ground
B. External Power Supply
Installation
FIGURE
8-9 and 8-10
8-11A
8-9 and 8-10
8-11B
Model 353
Rear Terminals
5
Station Common
6
1-5 Vdc
20
18
250
Common Ground Bus
Note: See Table 8.1 for AIN2,
3, and 4 terminals.
8-13