Siemens Moore 353 - Analog Signal Input Wiring (4-20 Ma, 1-5 VDC, and MV)

UM353-1 Installation
March 2003
8-13
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 FUNCTION BLOCKS
(1)
RANGE RESISTOR
(2)
FIGURE
4-20 mA AIN1-4
250Ω
8-9 and 8-10
AINU1 and 2
3.75Ω
8-11A
1-5 Vdc AIN1-4 Not Required 8-9 and 8-10
Millivolt AINU1 and 2 Not Required 8-11B
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.
5
20
+
_
Common Ground Bus
Earth
Ground
Model 353
Rear Terminals
18
Note: See Table 8.1 for AIN2,
3, and 4 terminals.
Controller Circuitry
Analog Signal,
e.g. Model 340 or
SITRANS P DSIII,
2-Wire Transmitter,
4-20 mA Output
+
_
X03107S3
6
250
External Device
1-5 Vdc
26 Vdc
6
20
+
_
Common Ground Bus
Earth
Ground
Model 353
Rear Terminals
18
Note: See Table 8.1 for AIN2,
3, and 4 terminals.
Controller Circuitry
Analog Signal,
e.g. Model 340 or
SITRANS P DSIII,
2-Wire Transmitter,
4-20 mA Output
MG000651a
250
External Device
1-5 Vdc
External Power Supply
+
_
Station Common
26 Vdc Typical
5
A. Controller Powered B. External Power Supply
FIGURE 8-9 Analog Input AIN1, 2-Wire Transmitter
StockCheck.com