02.00 Connections
Siemens AG 6RX1700-0AD76 6-61
SIMOREG DC Master Operating Instructions
Serial interface 2 RS485
Function Terminal
X172
Connection values/Remarks
TX+ 56 RS485, 4-wire send cable, positive differential input
TX- 57 RS485, 4-wire send cable, negative differential input
RX+/TX+ 58 RS485, 4-wire receive cable, positive differential input, 2-wire
send/receive cable, positive differential input
RX-/TX- 59 RS485, 4-wire receive cable, negative differential input, 2-wire
send/receive cable, negative differential input
M 60 Ground
Cable length: For transmission rate =187.5kBd ⇒ 600m
For transmission rate 93.75kBd ⇒ 1200m
The following must be observed: DIN 19245 Part 1
The potential difference between the data reference potentials M of all interfaces must not
exceed -7V / +12V. If this cannot be guaranteed, then equipotential bonding must be
provided.
Activation of interface 1 or 2:
– Set the baud rate in parameter P783 or P793.
– Set the protocol in parameter P780 or P790.
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