Installing and Configuring the Module (continued)

Selecting

No hardware changes are required for millivolt inputs. To select millivolt

Temperature or

input mode for an input turn OFF the M and L switch for the input channel.

Millivolt Input

(See Figure 2-2.) To select a particular RTD probe for each channel

 

configure the M and L switch.

 

 

M

L

 

 

0

0

Millivolt

 

0

1

10 Cu

 

1

0

100 Pt

 

1

1

120 Ni

NOTE: Each channel contains a jumper to select between 2, 3 and 4 wire RTD elements. (See Figure 2-2, JP68). For 2 wire and 3 wire RTDs no change is required. For 4 wire RTDs the jumper should be removed and placed on a single pin for storage.

Selecting 2 and 3 As shipped the module is ready to accept 2 and 3 wire RTDs. To configure

Wire or 4 Wire an input channel for 4 wire operation requires the following steps: Operation

1.Remove the 3 wire select jumper JP68±JP83 for the appropriate input channel and store on a single pin.

2.Move 2 input jumpers/channel to the 4 wire position. For example: To configure Channel 1, move JP1 and JP2 to the 4 wire position.

Selecting 10 Ohm If a 10 Ohm RTD is selected the gain of the input amplifier must be

RTD Inputsincreased to process the smaller signal levels. (See Figure 2-2.) JP49±JP64 are the amplifier gain select jumpers for Channels 1±16. No jumper changes are required to select 100 or 120 RTD.

Selecting PLC Login Locate JP67 on the printed circuit board to select PLC Login Mode

Mode(See Figure 2-2 ). Standard login is 16 WX registers in the PLC. Advanced Operating Mode logs in as 16 X, 16 Y, 32 WX and 32 WY registers. Consult the Siemens 255x Sixteen Channel Advanced Function Programming Reference Manual part #62±177, if the advanced operating mode is to be selected.

Selecting Digital Locate the Digital Filtering Jumper JP65 (See Figure 2-2). To enable digital

Filteringfiltering, set the jumper in the ENABLED position. Since many analog input signals contain noise, Siemens recommends using digital filtering unless maximum response time is required.

2-4

Installation

SIMATIC 505±2557 Installation and Operation Guide

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Siemens 505-2557 installation and operation guide Selecting, Temperature or, Millivolt Input