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4.2. I/O Module Functions • High Level Analog Input /HART Input Module (16pt) – The High Level Analog Input Module supports both high level analog and HART inputs. Analog inputs are typically 4-20mA DC for both traditional and HART devices. HART data can be used for status and configuration. HART data, such as the secondary and tertiary variables, can also be used as process control variables. Two versions Single ended and Differential type are available. • High Level Analog Input w/o HART (16pt) – The High Level Analog Input Module supports high level analog inputs Analog inputs are typically 4-20mA DC for traditional devices. • Analog Output/HART Output Module (16pt) – The Analog Output Module supports both standard 4-20mA DC outputs and HART transmitter outputs. • Analog Output w/o HART (16pt) – The Analog Output Module supports standard 4-20mA DC outputs. • Digital Input 24 VDC (32pt) – Digital input sensing for 24V signals • Digital Input Sequence of Events (32pt) – Accepts 24VDC discrete signals as discrete inputs. The inputs can be time tagged to support 1ms resolution Sequence of Events. • Digital Input Pulse Accumulation (32pt) – Accepts 24VDC discrete signals as discrete inputs. The first 16 channels can be configured as Pulse accumulation to support Pulse Accumulation and frequency measurement on per channel basis. Channels 17 – 32 can be configured as DI. • Digital Output 24 VDC (32pt) – Current sinking digital outputs. Outputs are electronically short-circuit protected. • DO Relay Extension Board (32pt) – Digital output with NO or NC dry contacts. It can be used for low power or high power applications. • Low Level Analog Input – RTD & TC (16pt) – Provides thermocouple (TC) and resistance temperature device (RTD) inputs. 4.3. Series 8 I/O Sizing In virtually all configurations, the C300 controller and Series 8 I/O provides useful, maintainable process equipment connections in a smaller footprint than existing competitors and Honeywell equivalent products. Installing Series 8 I/O modules contributes to overall total installed cost savings. IOTA sizes vary based on the application. In general, an analog module has 16 points and resides on a 6 inch (152mm) IOTA for non-redundant applications and a 12 inch (304mm) IOTA for redundant applications. A discrete module has 32 points and resides on a 9-inch (228mm) IOTA for non-redundant applications and a 12 inch (304mm) IOTA for redundant applications. Specific information on the size of a particular module is described in the Model Number Table. 4.3.1. Series 8 Field connections Series 8 Field connections use a standard modular connector. The connector modularity allows for removal and insertion of the field wiring. This significantly reduces installation and maintenance procedures and can assist in field check out. Series 8 field connectors accept up to 12 AWG / 2.5 mm2 stranded wire.