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MR-AIO4/2-IP65 Modbus RTU

906747
931803
870663
906754
Description

The Modbus module in an IP65 housing with 4 individually configurable resistance or voltage inputs and 2 analog outputs was developed for decentralized tasks. The inputs are suitable for detecting resistances and voltages of for example, passive and active temperature sensors, electrical vent and mixing valves, valve positions, etc. The outputs are suitable as encoder for control variables for example for electrical vent and mixing valves, valve positions, etc. Via a Modbus master the inputs can be configured universally by standard registers and the outputs can be set. The module address, the bit rate and the parity are set with two rotary switches or by software. The Modbus module has two integrated PID controllers which can be used for room control, for example. The settings of the PID controllers are done via the Modbus registers and can be found in the Modbus software manual at www.metz-connect.com. Using the Modbus Gateway MR-GW from METZ CONNECT, the settings can be done faster and more conveniently via the graphical interface of the built-in WEB server.

Technical Data
General Data
Modbus RTU
00 to 99
RS485 (two-wire-bus)
1200 to 115200 bit/s
24 V AC/DC +/- 10% (SELV)
90 mA (AC) / 35 mA (DC)
100 %
4x individually configurable
40 Ohm to 4 MOhm
0 to 10 V DC
2x analog
0 V to 10 V DC
5 mA at 10 V DC
LED green, red, yellow
160 x 40.7 x 120 mm
104 g
-5 °C to +55 °C
-20 °C to +70 °C
IP65 / IP20
Check US distributor inventory
Accessories
777960
HUB DC
906226
Power supply NG4 24 V DC
Part number
11084213IP
4250184172871
Downloads
FAQ's

What can I do if the red ERROR LED on the module lights up or there is no communication?

There are several possible causes, please check the following:

- Operating voltage (A1 / A2) connected and sufficient for the device.
- BUS (A- / B+) connected and not reversed. Pay attention to (- / +), not to A/B.
- Address (rotary switches) set correctly, must not occur twice or be 0.
- Bit rate and parity (rotary switches) set correctly, only possible in programming mode (see mounting note).
- Shielded and twisted pair cable used.
- Termination resistor (120 Ω) set on both sides.
- Bias resistors available on the BUS.
- Timeout high enough for all participants to respond (approx. 10 ms).

What can I do if the red ERROR LED on the module lights up or there is no communication?

There are several possible causes, please check the following:

- Operating voltage (A1 / A2) connected and sufficient for the device.
- BUS (A- / B+) connected and not reversed. Pay attention to (- / +), not to A/B.
- Address (rotary switches) set correctly, must not occur twice or be 0.
- Bit rate (rotary switches) set correctly, only possible in programming mode (see mounting note).
- Shielded and twisted pair cable used.
- Termination resistor (120 Ω) set on both sides.
- Bias resistors available on the BUS.
- Max Master as high as the number of physical master I/Os on the BUS.
- Max Frame high enough for all answers from participants to get through (BMT-RTR setting).

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