Table 17:
Connector X8 signals
Pin No
Pin name
Description
Alternative
1
GND
EARTH
2
GNDC
GND connected to
earth via 1nF capacitor
3
NC
4
IRIG-B -
ISOL2_GND
5
IRIG-B +
6
ISOL_GND
RS485 GND
7
RS485 B1/-
2-wire - , COM1
4-wire TX pair, COM1
8
RS485 A1/+
2-wire + , COM1
4-wire TX pair, COM1
9
RS485 B2/-
2-wire - , COM2
4-wire RX pair, COM1
10
RS485 A2/+
2-wire + , COM2
4-wire RX pair, COM1
1
2
3
4
5
6
7
8
9
10
GUID-3638E235-AB2E-4571-B1EE-DF76AEA0FC36 V1 EN
Figure 90:
X8 connector pinout
Table 18:
LED configuration (COM1004...COM1005)
LED
Description
X1
X1 LANA
X2
X2 LANB
X6
X6 LD
X7 TX
FO-UART
X8 TX
RS-485/COM2
X8 TX
RS-485/COM1
IRIG-B
IRIG-B
1MRS759118 A
Section 7
Commissioning
REX640
107
Operation Manual