ABB 81EU01H-E GJR2391500R1210 GJR2391511R42 module

Input Voltage Range The input voltage range (full scale voltage at the input of each channel) is determined by both the analog input gain and the A/D converter voltage range: INPUT VOLTAGE RANGE = CONVERTER VOLTAGE RANGE ÷ INPUT GAIN For example, an input gain of x10 combined with a converter voltage range of ±5 V produces an input voltage range of ±500 mV (±0.5 V).Do NOT apply input voltages or gain combinations which exceed the converter voltage range. For example: A gain of 10 with an input voltage greater than 1.2 volts exceeds the maximum converter voltage range. In these cases, the data received will not be valid but may appear as valid data.

Input Configurations

 The analog inputs can be configured as single-ended, or differential channels, as shown in Table 2-4 on page 35. The configurations are selected in groups of four consecutive channels by the positions of jumpers E1 and E2, and by the locations of SIP (single-in-line-package) resistor networks. Each LOW side input has a 22 MΩ resistor tied to AGND. The purpose of this resistor is to provide floating input protection. If the input lead is not connected, the board will see that channel at ground thru 22 MΩ resistor.

Internal Ground Connections

 All pins in the center “B” rows of both input connectors P3 and P4 are tied together to AGND and provide a ground path and interchannel guards between differential input pairs when 96-wire 0.033-inch ribbon cables are used. The LOW input for Channel 31 or 63 can be connected to AGND by installing E1-1,2 (Channel 31) or E2-1,2 (Channel 63). Installation of either of these jumpers configures the associated channel as a single-ended input. Each jumper must be removed for differential operation of the associated channel.

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