Meggitt VM600 - CPUM Card (Carrier Board); Optional Serial Communications Module (AIM104-COM4 or Equivalent)

13 - 8 VM600 MPS hardware manual (standard version) MAMPS-HW/E
Edition 17 - February 2018
Configuring RS-485 terminations for RS, A and B serial communications
CONFIGURATION OF CPUM / IOCN CARDS
13.4.1 CPUM card (carrier board)
For half-duplex RS-485 (2-wire), only jumpers J31 to J34 need to be configured.
For full-duplex RS-485 (4-wire), jumper groups J31 to J34 and J35 to J38 and must be
configured identically.
Further details on RS-485 terminations can be found in Table 13-1.
13.4.2 Optional serial communications module (AIM104-COM4 or equivalent)
For half-duplex RS-485 (2-wire), only jumpers LK15 and LK16 need to be configured. These
groups should be configured identically
For full-duplex RS-485 (4-wire), jumper groups LK13 and LK15, and LK14 and LK16 must be
configured identically.
Further details on RS-485 terminations can be found in Table 13-1.
Table 13-1: RS-485 terminations
Type of
RS-485
Serial
communications
(connector)
Jumper location Jumpers
Half-duplex
(2-wire)
RS
CPUM card
(carrier board)
J31 to J34
Half-duplex
(2-wire)
A
Optional serial
communications module
(AIM104-COM4 or
equivalent)
LK15
Half-duplex
(2-wire)
B
Optional serial
communications module
(AIM104-COM4 or
equivalent)
LK16
Full-duplex
(4-wire)
RS
CPUM card
(carrier board)
J31 to J34 and
J35 to J38
Full-duplex
(4-wire)
A
Optional serial
communications module
(AIM104-COM4 or
equivalent)
LK13 and LK15
Full-duplex
(4-wire)
B
Optional serial
communications module
(AIM104-COM4 or
equivalent)
LK14 and LK16