Ethernet interface converter
RS485
Connecting the interface converter (Ethernet) – example of a fan with MODBUS RTU compatibility
The Ethernet interface converter serves to integrate bus-compatible EC fans into existing computer networks. This increases the spatial independence
of the control room and fans. Other than a power supply, all that is needed is a static IP address, which can be assigned easily using the EC Control
software. Multiple Ethernet interface converters can be used without any problems. This allows, for example, larger systems to be divided up spatially
to reduce latencies.
This interface converter permits bi-directional connection of RS485 units and Ethernet-compatible
computers or laptops using the EC Control software (article No. 25714-2-0199) Note for large systems: After 31 fans, a repeater can be installed in order to connect another 31 fans.
Nominal data
Type 21488-1-0174 21489-1-0174 (UL version)
Nominal voltage and plug-in supply unit VAC 100–240 100–240
Power supply VDC 12–48 12–48
Current draw mA 85 85
Frequency Hz 50/60 50/60
Ambient temperature (arranged in series) °C 0 to +50 0 to +50
Ambient temperature (not arranged in series) °C 0 to +60 0 to +60
Dimensions mm 105 x 75 x 22 105 x 75 x 22
1
Operating mode RS485, two-wire mode without echo, automatic switchover between send and receive
External sensor
Pressure sensor,
temperature sensor
Safety Electrical isolation between Ethernet and RS485
Laptop
Electrical isolation min. 500 V
Power supply
Fans
MODBUS RTU RSA/RSB
Ethernet connection 8-pole RJ45 socket
10/100 Mbps autosensing
Interface converter Ethernet/TCP/IP
Ethernet
RS485 connection 9-pole SUB-D plug, depending on configuration:
Art. No. 21488-1-0174
Art. No. 21489-1-0174
– 9,600 baud, 8 data bits, 1 stop bit, no parity (ebmBUS) or
– 19,200 baud, 8 data bits, 1 stop bit, even parity (MODBUS RTU)
2
Protocols used –TCP
– Telnet
Status display Via LEDs
– Green (left): power supply
– Green (right): data communication
– Red: fault 1 Example terminal assignment for fan 2 Interface converter connection
Housing Plastic housing
KL3 KL2 PE KL1
Type of protection IP 10
Installation Standard rail mounting in accordance with DIN EN 50022-35
Din2 Din3 GND
Ain2 U
+20V Ain2 I
Aout
Delivery scope – Interface converter
– Plug-in supply unit
– RS485 cable, D-Sub to screw terminal
RSA RSB GND
NO
Ain1 U
+10V Ain1 I
Din1 COM
NC PE L1 L2 L3
A = RSA
AB
– Network cable (crossover, Cat 5)
B = RSB
– German and English product description
16 17
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