4000 & 5000 Series User’s Guide
2.3.2 I/O Specifications
The modem has 4 digital inputs, 3 analog inputs and 3 digital outputs for remote control and
monitoring. The third digital output (O3) is located on the power connector for all modems.
The third analog input (AI3) is not available on the 4200/5200 models.
AI2
GND
AI1
AI3
O2
DI2
O1
DI1
DI4
DI3
Figure 2 – I/Os (Looking at back of modem)
3x Digital Outputs (O1, O2, O3) – O3 available on Power connector
Configuration
Open Collector, reference to ground
Absolute Maximum IDC
500mADC (Vce = 750mVDC)
Absolute Maximum VDC
30VDC (open circuit)
Absolute Minimum VDC
0.4VDC (open circuit)
4x Digital Inputs (DI1, DI2, DI3, DI4)
Configuration
Non-isolated level detection, reference to ground
Active level
1.6VDC to 30VDC
Inactive level
0VDC to 1.3VDC
Absolute Minimum VDC
0.3VDC
Absolute Maximum VDC
33VDC
Leakage IDC at 5VDC
150uADC
3x Analog Inputs (AI1, AI2, AI3) – AI3 only available on 4600/5600
Configuration
Not isolated input, reference to ground
Resolution
1024 (ADC 10-bit)
VDC per step
4.8875855mVDC
Full scale level
5VDC
Zero level
0VDC
Absolute Minimum VDC
-0.3VDC
Absolute Maximum VDC
8.3VDC
Leakage IDC at 5VDC
265.96 uADC TYPE
Table 4
Revision 1.5
Copyright © 2007 BlueTree Wireless Data Inc. Page 11 of 67