The power supply must be protected with a 2 A slow-blow fuse.
5.1.2 Slot #2, external communication (optional)
Option H2 (Modbus RS-485)
Terminal Function Description
29 DATA + (A) Modbus RTU/ASCII, RS-485
30 Not used
31 DATA - (B)
32 Not used
33 DATA + (A)
34 Not used
35 DATA - (B)
36 Not used
The serial communication line should be terminated between DATA + and DATA - with a resis-
tor equal to the cable impedance. The terminals 29/33 and 31/35 are internally connected.
Option H3 (Profibus DP)
Terminal Function Description
29 DATA + (B) Pin 3 on 9-pole sub-D connector
Pin 5 on 9-pole sub-D connector
Pin 8 on 9-pole sub-D connector
30 GND
31 DATA - (A)
32 DATA + (B)
33 GND
34 DATA - (A)
35 Not used
36 Not used
ML-2 installation instructions 4189340582
UK
I/O lists
DEIF A/S Page 14 of 64
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