GE IC670ALG230 Analog Input Module
General info
Manufacture | GE |
Item No | IC670ALG230 |
Article number | IC670ALG230 |
Series | GE FANUC |
Origin | United States(US) |
Dimension | 180*180*30(mm) |
Weight | 0.9 kg |
Customs Tariff Number | 85389091 |
Type | Analog Input Module |
Detailed data
GE IC670ALG230 Analog Input Module
The Current Source Analog Input Module (IC670ALG230) accommodates 8 inputs on a common power supply.
About Power Sources
In most cases, the same 24 volt supply used by the bus interface unit can provide loop power. If isolation between circuits is required, a separate supply must be used. The most common application is to drive multiple isolated sensors, isolated analog inputs, or differential analog inputs using loop power local to the module.
Field Wiring
The input signals share a single signal common return. For good noise immunity, establish the system signal common, power reference, and ground close to this single endpoint. The signal common for the input module (as defined by most standards) is the negative terminal of the 24 volt supply. The chassis ground of the module is connected to the I/O terminal block ground terminal. For improved noise immunity, connect it to the chassis of the enclosure with a short wire.
Two-wire loop-powered transmitters (Type 2) should have isolated or ungrounded sensor inputs. Loop-powered devices should use the same power supply as the input module. If a different power supply must be used, connect the signal common to the module common. Also, ground the signal common at only one point, preferably at the input module. If the power supply is not grounded, the entire analog network is at floating potential (except for the cable shield). Therefore, if this circuit has a separate isolated power supply, it can be isolated.
If shielded wires are used to reduce noise pickup, the shield drain wire should have a different ground path from any loop power ground to avoid noise induction due to leakage currents.
Three-wire transmitters require a third wire for power. The shield can be used as a power return. If the system is isolated, a third wire (three-wire cable) should be used instead of the shield for power and the shield should be grounded.
It is also possible to use a separate remote power supply. A floating supply should be used for best results. Connecting both supplies to ground creates a ground loop. Nevertheless, the circuit may still work, but good results require very good voltage compliance at the transmitter.
