Electrical Connection¶
The Analog Input/Output Module AX561 can be connected to the following devices via the I/O-Bus connector:
- S500 Bus Modules (e. g. CI592-CS31, CI501-PNIO, CI541-DP, CI581-CN)
- AC500 CPUs (PM5xx)
- other AC500 I/O Modules
Note
The AX561 must not be used as a remote expansion module at DC505-FBP and CI590-CS31-HA Bus Modules.
Note
Mounting, disassembling and electrical connection for the I/O Modules are described in detail in S500 System Data S500 System Data, Overview .
The electrical connection is carried out by using a removable 9-pole and 11-pole Terminal Block. These terminal blocks differ in their connection system (spring terminals or screw-type terminals, cable mounting from the front or from the side). For more information, refer to Terminal Blocks for S500-eCo I/O Modules TA563-TA565 Terminal Blocks for AC500-eCo I/O Modules and AC500-eCo \ CPUs. The terminal blocks are not included in the module’s scope of delivery and must be ordered separately.
The following block diagram shows the internal construction of the analog inputs and outputs:
The assignment of the terminals:
| Terminal | Signal | Meaning |
|---|---|---|
| 1 | R0 | Burden resistor for input signal 0 for current sensing |
| 2 | I0+ | Plus pole of input signal 0 |
| 3 | I0- | Minus pole of input signal 0 |
| 4 | R1 | Burden resistor for input signal 1 for current sensing |
| 5 | I1+ | Plus pole of input signal 1 |
| 6 | I1- | Minus pole of input signal 1 |
| 7 | R2 | Burden resistor for input signal 2 for current sensing |
| 8 | I2+ | Plus pole of input signal 2 |
| 9 | I2- | Minus pole of input signal 2 |
| 10 | R3 | Burden resistor for input signal 3 for current sensing |
| 11 | I3+ | Plus pole of input signal 3 |
| 12 | I3- | Minus pole of input signal 3 |
| 13 | O0U+ | Voltage output of channel 0 |
| 14 | O0I+ | Current output of channel 0 |
| 15 | O1U+ | Voltage output of channel 1 |
| 16 | O1I+ | Current output of channel 1 |
| 17 | O01- | Minus pole of channels O0 and O1 |
| 18 | SG | Signal ground |
| 19 | L+ | Process voltage L+ (24 V DC) |
| 20 | M | Process voltage M (0 V DC) |
The internal power supply voltage for the module’s circuitry is carried out via the I/O-Bus (provided by a Bus Module or a CPU). Thus, the current consumption from 24 V DC power supply at the terminals UP/L+ and ZP/M of the CPU/Bus Module increases by 5 mA per AX561.
The external power supply connection is carried out via the L+ (+24 V DC) and the M (0 V DC) terminals. The M terminal is electrically interconnected to the M/ZP terminal of the CPU/Bus Module.
Caution
:strong:Risk of imprecise and faulty measurements!
Analog signals may be distorted seriously by external electromagnetic influences.
Use shielded wires when wiring analog signal sources. The cable shield must be grounded at both ends of the cable. Provide a potential equalisation of a low resistance to avoid high potential differences between different parts of the plant.
Caution
:strong:Risk of damaging the PLC modules!
The PLC modules must not be removed when the plant is powered on.
Make sure that all voltage sources (supply and process voltage) are switched off before you are
- connecting or disconnecting any signal or terminal block
- removing or replacing a module.
Caution
:strong:Risk of damaging the PLC modules!
The PLC modules can be damaged by overvoltages and short circuits.
Make sure that all voltage sources (supply and process voltage) are switched off before you are beginning with operations at the system.
The module provides several diagnosis functions Analog Input/Output Module AX561.
The following figure shows exemplarily the internal construction of the analog input AI0. The analog inputs AI1 … AI3 are designed in the same way.
Internal construction of the analog inputs
Caution
:strong:Risk of damaging the analog input!
The 250 Ω input resistor can be damaged by overcurrent.
Make sure that the current through the resistor never exceeds 30 mA.
The following figures show exemplarily the electrical connection of analog sensors (voltage) to the input I0 of the Analog Input/Output Module AX561. Proceed with the inputs I1 to I3 in the same way.
| Connection of active-type analog sensors (voltage) | Connection of passive-type analog sensors (voltage) |
The following figures show exemplarily the electrical connection of analog sensors (current) to the input I0 of the Analog Input/Output Module AX561. Proceed with the inputs I1 to I3 in the same way.
| Connection of active-type analog sensors (current) | Connection of passive-type analog sensors (current) |
The following figures show the electrical connection of analog actuators to the Analog Input/Output Module AX561.
| Connection of analog voltage actuators | Connection of analog current actuators |
Note
The output signal is undefined if the supply voltage at the L+ terminal is below 10 V. For example this can happen if the supply voltage has a slow ramp-up / ramp-down behaviour and must be foreseen in the planning of the installation.
Note
If the output is configured in current mode, the voltage output signal is undefined and must not be connected.
Note
If the output is configured in voltage mode, the current output signal is undefined and must not be connected.
The meaning of the LEDs is described in the displays chapter Analog Input/Output Module AX561.