Electro Industries/GaugeTech
Doc # E107706 V1.259-9
Default Settings
(Reset Button)
9.6: Analog Input Modules
Analog Input Modules Specifications
Model Numbers
8AI1: 8-Channel Analog Input, 0±1mA
8AI2: 8-Channel Analog Input, 0±20mA
8AI3: 8-Channel Analog Input, 0±5Vdc
8AI4: 8-Channel Analog Input, 0±10Vdc
Accuracy 0.1% of Full Scale
Scaling Programmable
Communication RS-485, Modbus RTU
Programmable Baud Rates: 4800, 9600, 19200,57600
Power Requirement
15-20Vdc at 50-200mA;
Nexus 1250/1252 Unit
supports up to 4 Modules
Operating Temperature (-20 to 79)°C / (-4 to +158)°F
Maximum Load
Impedance 0-1mA: 10k Ω; 4-20mA: 500 Ω
Factory Settings
Modbus Address:
8AI1, 0±1mA: 136; 8AI2, 0±20mA: 140
8AI3, 0±5Vdc: 144, 8AI4, 0±10Vdc: 148
Baud Rate: 57600
Modbus Address: 247
Baud Rate: 57600
9.6.1: Overview
QThe Analog Input Modules (0±1mA, 0±20mA, 0±5Vdc and 0±10Vdc) are available in 8-channel

format. Maximum registers per request, read or write, is 17 registers.

QNexus 1250/1252 Unit supplies power for up to 4 connected Analog Input modules. See section 9.2

for power and communication details. Refer to sections 5.12 - 5.13 to determine if you must use an

additonal power source, such as the EIG PSIO.

QAll inputs share a single common point. This is also an isolated connection (from ground).
Transmit Delay Time: 0
Transmit Delay Time: 20 csec