Owner`s manual

M SERIES DAC
CABLING
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12
7 SGND ---- Signal Ground
14 TX+ Output Transmit Data (+)
16 RX+ Input Receive Data (+)
20 HSO Output Handshake Out, enable/disable the receiving
of characters
The required cable should have TX+ connected to RX+ (and vice versa), TX-
connected to RX- (and vice versa), HSO connected to HSI (and vice versa), and have
the signal grounds connected as shown below.
V71 (EIA-422) Equipment
DB-25 Connections
1 GND GND
2 TX- RX-
3 RX- TX-
5 HSI HSO
7 GND GND
14 TX+ RX+
16 RX+ TX+
20 HSO HSI
NOTE: If you wish to use RJ-11 (4-wire) cabling, connect pins 3 through 6
on the RJ-45 connector as shown above. In addition, you should enable
XON/XOFF handshaking as described on page 49.
V71 CURRENT LOOP LINE INTERFACE
IMPORTANT: If you intend to use current loop line interface, you must
use the DB-25 connector on the V71 and reconfigure the line interface to
current loop as described on page 49
Current loop line interface provides active transmit and active or passive receive
signals. The V71 RJ-45 port uses the following signals for current loop line interface
with active transmit and passive receive:
DB-25 PIN/SIGNAL DEFINITION FOR CURRENT LOOP
(ACTIVE TX PASSIVE RX)
Pin# Current Loop Signal Direction Description
9 TX+ Output Transmit Data (+)