CTI Products IIB Console Interface - Manual (Page 8)

IIB Hardware Reference Specifications
CTI Products, Inc.
68-10844-115
3
Figure 2 shows the equivalent circuits of the IIB I/O pins. The pull-up voltage Vp
by jumper E1B, located on the rear of the module.
•
Vp = 13.8 Vdc with jumper E1B out
•
Vp = 5.0 Vdc with jumper E1B in
CA-80043-100 CA-80043-100
0.1uF
22K
Vp
150K
HCMOS
IC
INPUT
PROTECTION
ESD
30V
TRANSORB
0.1uF
22K
Vp
PROTECTION
ESD
30V
TRANSORB
180K
+5V
0.1uF
22K
Vp
150K
HCMOS
IC
INPUT
PROTECTION
ESD
30V
TRANSORB
+5V
+5V
INPUT/OUTPUT
OUTPUT
INPUT
Figure 2 - I/O Equivalent Circuit