AC2516 - Electronic module IFM - Free user manual and instructions

Product type	Analog input AS-i module
Brand	IFM
Model	AC2516
Number of channels	4 analog inputs
Measurement type	Current 4...20 mA
Resolution	1 µA
Power supply	Via AS-i (max. 100 mA) or external 24 V SELV (max. 500 mA)
Sensor supply	Via AS-i (max. 100 mA) or external 24 V (max. 500 mA)
Connection	M12 5-pin connectors
AS-i profile	S-7.3.E
Max. number of modules per AS-i bus	31
Conversion time (1 channel)	20 ms
Conversion time (4 channels)	240 ms
Input resistance (current)	< 50 Ω
LED indicators	PWR (green), AUX (green), FAULT (red), AI1-AI4 (yellow)
Addressing	Via AC1144 addressing unit or E70213 cable
Mounting	On wiring base, torque 0.8 Nm
Protection	IP protection rating (not specified, industrial use)
Maintenance	No special maintenance. Clean with a dry cloth.
Safety	Follow assembly and wiring instructions. SELV power supply.
Spare parts	Wiring bases (AC5000, AC5003, etc.), addressing cable E70213
Repairability	Module not repairable. Replace with a new one.
General information	Compliant with AS-i V2.1 specification. Bidirectional.

Frequently Asked Questions - AC2516 IFM

How to address the AC2516 module?

Use an AC1144 addressing unit to assign an address between 1 and 31. If the wiring base has an addressing socket (AC5010/AC5011), use the E70213 cable for subsequent addressing.

Which sensors can be connected?

Current sensors 4...20 mA with 2, 3 or 4 wires. The connection depends on the sensor type: with or without its own power supply.

What does the flashing of the yellow AI LEDs mean?

The yellow AI LEDs flash if the analog signal is outside the measuring range, if no sensor is connected, or in case of wire break.

How to configure the internal shunt for 4-wire sensors?

For a 4-wire sensor, disable the internal shunt by setting parameter bit P0 to 0 via the AS-i master.

Which power supply to use for the sensors?

The sensor supply can be via AS-i (max. 100 mA total) or via an external 24 V SELV supply (max. 500 mA). If the total current exceeds 100 mA, an external supply is required.

How to interpret the red FAULT LED?

A solid FAULT LED indicates an AS-i communication error (e.g., address 0). Flashing indicates a device fault (out-of-range signal, wire break, etc.).

What is the measuring range of the AC2516?

The nominal range is 4 to 20 mA. Below 4 mA, the value is <1 mA (break); above 20 mA, up to 23 mA is tolerated; above that, the LED flashes.

How to enable or disable a channel?

Use parameter bits P1 and P2 of the AS-i master. For example, P1=0, P2=0 activates only channel 1; P1=1, P2=1 activates all 4 channels.

What is the transmission time for 2 channels?

The conversion time is 120 ms, and the transmission via AS-i takes about 70 ms (2 × 7 cycles × 5 ms), for a total of about 190 ms.

Can I use a wiring base without an addressing socket?

Yes, but in that case, you must address the module before mounting on the base, using an AC1144 addressing unit.

USER MANUAL AC2516 IFM

Function and features

The slave converts analogue input signals and transfers them to the AS-i master via the AS-Interface. The AS-i module operates as a slave with bidirectional data transfer in the AS-i network.

The data transfer to the host is asynchronous according to the AS-i profile S-7.3 and the AS-i specification V2.1.

• Current measurement 4...20 mA (AC2516, AC2566)
  or voltage measurement 0...10 V (AC2517)
  AS-i profile S-7.3.E
• The sensors are connected via M12 connection cables
  Maximum number of modules per AS-i system: 31
• R_i voltage measurement > 100 k ; R_i current measurement < 50

• Time for converting the measured values in the slave

• for one channel: 20 ms

• for two channels: 120 ms
• for three channels: 180 ms

• for four channels: 240 ms

• Sensor supply from AS-i (max. 100 mA) or external 24 V PELV voltage source (black flat cable, max. 500 mA)

• Resolution: 1 A (AC2516, AC2566) or 1mV (AC2517)
• special features AC2566: stainless steel screws, Viton sealing

Installation / Addressing

When you use module lower parts without addressing socket (AC5000 or AC5003) first address the module by placing it onto an addressing unit (AC1144) and assign a free address between 1 and 31.

When you use module lower parts with an addressing socket (AC5010 or AC5011) the modules can be addressed with the addressing adapter E70213 later on.

Mount the module onto the wired module lower part of the AS-i network, tightening torque 0.8 Nm.

As an alternative FC/FC-E lower parts with earthing lead (AC5020...AC5023) can be used to increase the noise immunity.

Electrical connection

The analogue module is connected to the AS-Interface via the standardised EMS (supply from AS-i) or the E-EMS (supply from an ext. 24 V PELV voltage source).

If the supply is to be from an external 24 V source, a FC-E lower part (art. no. AC5003 or AC5011) must be used.

If a total of over 100mA is needed for the sensor supply, the supply must be from an external 24 V PELV voltage source.

The supply is automatically changed when the external 24V voltage is supplied.

Risk of destruction:

When a combined sensor (pin 2: analogue output, pin 4: 24 V output) is connected ensure that the switching output cannot switch. To do so, set the combined sensor accordingly (e.g. by selection of a switch point which cannot be reached or by the configuration "NPN switching").

Current measurement AC2516, AC2566

For all the following wiring diagrams the indicated pin connection refers to the analogue module.

When an external link between pin 3 and pin 4 is used, the internal link can be deactivated by resetting the parameter bit P0!

The internal link (pin 3 and pin 4) must be activated via the parameter bit P0.

Connection of a 2-wire sensor without own supply

Pin 1: sensor supply +24 V

Pin 2: Al+ analogue input

Pin 3: sensor supply 0V

Pin 4: Al- analogue input 0V

Pin 5: functional earth

Connection of a 2-wire sensor with own supply

Pin 1: sensor supply +24 V

Pin 2: Al+ analogue input

Pin 3: sensor supply 0V

Pin 4: Al- analogue input 0V

Pin 5: functional earth

Connection of a 3-wire sensor without own supply

Pin 1: sensor supply +24 V
Pin 2: Al+ analogue input
Pin 3: sensor supply 0V
Pin 4: Al- analogue input 0V
Pin 5: functional earth

Connection of a 4-wire sensor without own supply

Pin 1: sensor supply +24 V
Pin 2: Al+ analogue input
Pin 3: sensor supply 0V
Pin 4: Al- analogue input 0V
Pin 5: functional earth

When a 4-wire sensor is connected the internal link between pin 3 and pin 4 must be deactivated by resetting the parameter bit P0.

Voltage measurement AC2517

The parameter bit P0 is of no importance for the AC2517!

Connection of a 2-wire sensor without own supply

Pin 1: sensor supply +24 V

Pin 2: Al+ analogue input

Pin 3: sensor supply 0V

Pin 4: Al- analogue input 0V

Pin 5: functional earth

Connection of a 3-wire sensor without own supply

Pin 1: sensor supply +24 V

Pin 2: Al+ analogue input

Pin 3: sensor supply 0V

Pin 4: Al- analogue input 0V

Pin 5: functional earth

When a 3-wire sensor without own supply is connected the link between pin 3 and pin 4 has to be created externally!

Parameter setting of the analogue modules

Parameter bit	Designation	Description
P0(not used for AC2517)	selection2/3 wires / 4 wires	1 2-/3-wire operation (link active)0 4-wire operation (link inactive)
P1, P2	channel activation	P1 P2 channel1 channel2 channel3 channel40 0 on off off off offoffon
		0 1 on on on on on on on
		1 0 on on on on on on on
		1 1 on on on on on
P3	periphery fault	1 periphery fault indication active0 periphery fault indication not active

Operation AC2516, AC2566

Check whether the unit operates correctly. Display by LEDs:

• LEDs yellow Al-1...Al-4 on: analogue signal in the measuring range
• LEDs yellow Al-1...Al-4 flashing: analogue signal outside the measuring range, no sensor connected or wire break
• LEDs yellow Al-2...Al-4 out: no sensor connected (at least one LED flashes because not all channels can be deactivated via the parameter bit P1/P2 (channel activation, channel 1 is always activated)
• LED green PWR on: AS-i voltage applied
• LED green AUX on: external 24 V voltage applied
• LED red FAULT on: AS-i communication error, e.g. slave address 0
• LED red FAULT flashes: periphery fault*
• Periphery fault
  A periphery fault is displayed:
• if at least one of the analogue signals is outside the value range
• if nothing is connected to at least one analogue channel although the respective channel is activated
• if a wire break occurred

Operation AC2517

Check whether the unit operates correctly. Display by LEDs:

• LEDs yellow Al-1...Al-4 on: respective channel is activated analogue signal in the measuring range or no sensor connected (it cannot be differentiated whether the 0V signal is applied or whether no sensor is connected) (channel 1 is always activated)

• LEDs yellow Al-1...Al-4 flashing: analogue signal outside the measuring range (outside range)

• LEDs yellow Al-2...Al-4 out: respective channel is not activated

• LED green PWR on: AS-i voltage applied
• LED green AUX on: external 24 V voltage applied
• LED red FAULT on: AS-i communication error, e.g. slave address 0

• LED red FAULT flashes: periphery fault*

• Periphery fault

A periphery fault is displayed:

• if at least one of the analogue signals is outside the value range

Measuring range of the analogue input modules

The measuring ranges, the states of the LEDs and their meaning are indicated in the following tables:

Analogue input module 4 ... 20 mA - AC2516, AC2566

Range 4 ... 20mA	Units dec.	Units hex.	LED AI1...AI4 analogue	Meaning
< 1 mA 327	67	7FFF flashes wire break
1 mA ...	1000 ... 3999	03E8 ... 0F9F on below nominal		range
3.999 mA
4 mA ...	4000 ... 20000	0FA0 ... 4E20 on nominal range
20 mA
20.001 mA ...	20001 ... 23000	4E21 ... 59D8	on	above nominal range
23 mA
> 23 mA	32767	7FFF	flashes	outside range

Analogue input module 0 ... 10 V - AC2517

Range 0 ... 10 V	Units dec.	Units hex.	LED analogue	Meaning
0 ... 10 V 0000 ... 10000 0000	... 2710 on nominal range
10.001 V ... 11.5 V	10001 ... 11500	2711 ... 2CEC on	above nominal	range
> 11.5 V	32767	7FFF	flashes	outside range

Transmission time of the analogue values

The transmission time of the analogue values depends on the conversion time of the analogue signals into digital signals in the AS-i module and on the transmission time via the AS-Interface.

Example: Transmission time of 2 analogue channels

The conversion time for 2 analogue input signals into digital signals is 120~ms . The transmission time of the 2 16-bit values via the AS-interface ideally is 7 AS-i cycles per value. For a cycle time of 5 ms per ASi cycle this results in a transmission time of 2 × 7 × 5 ms = 70 ms via the AS-Interface.

Thus the total transmission time for 2 analogue values ideally is 120ms (conversion time) +70 ms (transmission time) = 190 ms.

Example: Transmission time of 4 analogue channels

The conversion time for 4 analogue input signals into digital signals is 240~ms . The transmission time of the 4 16-bit values via the AS-interface ideally is 7 AS-i cycles per value. For a cycle time of 5 ms per AS-i cycle this results in a transmission time of 4 × 7 × 5~ms = 140~ms via the AS-Interface.

Thus the total transmission time for 4 analogue values ideally is 240ms (conversion time) +140 ms (transmission time) = 380 ms.