Instruction manual
WIRING FORMATS (cont’d)
MillBus / Multiple BIC-II Interconnection
1. One 100 Ω MillBus loop termination resistor is supplied with each BIC-II. For single BIC-II operation,
the resistor is connected to TB2 - 4/5. For multiple BIC-II operation, connect the 100 Ω resistors to
the unused MillBus connections, TB2 - 1/2 of BIC-II #1 and TB2 - 4/5 of the last BIC-II.
2. The maximum number of BIC-II’s per Millbus is 31.
3. The MillBus circuitry utilizes an isolated power supply. Shield connection TB2 - 3 is either isolated
from chassis ground when J1 - 2/3 is jumpered or tied to chassis ground when J1 - 1/2 is jumpered.
FIG. 3G
Board B
Board B
Board B
MILLBUS
181716151413121110987654321
TB2
+
IN
- +
OUT
-
U
TN
-
I
-
IN
++
O
OUT
RS-232
RS-422
C
O
M
O
M
C
O
M
C
P
12
V
P
5
V
MILLBUS
181716151413121110987654321
TB2
+
IN
- +
OUT
-
U
TN
-
I
-
IN
++
O
OUT
RS-232
RS-422
C
O
M
O
M
C
O
M
C
P
12
V
P
5
V
MILLBUS
181716151413121110987654321
TB2
+
IN
- +
OUT
-
U
TN
-
I
-
IN
++
O
OUT
RS-232
RS-422
C
O
M
O
M
C
O
M
CP
12
V
P
5
V
V
5
P
V
12
P
C
M
O
C
M
O
M
O
C
RS-422
RS-232
OUT
O
+ +
IN
-
I
-
N T
U
-
OUT
+-
IN
+
TB2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
MILLBUS
BIC-II #2
BIC-II #3
or last
BIC-II #1
Belden 8760,
1200 m (4000 ft)
maximum run
from BIC-II #1 to
last BIC-II
PL-371 12 – 9