Triguard SC300E TAI16AEA 16-Channel Analogue Input Termination Module (TAI16AEA) Issue 6 October 2005 INTRODUCTION PURPOSE The TAI16AEA 16-Channel Analogue Input Termination Card provides an interface between the analogue input circuits of a SC300E chassis and the field devices they are monitoring. The TAI16AEA provides: • Screw terminals for the field wiring • Fuse protection for the field loops • Overvoltage protection and transient suppression.
Triguard SC300E Field cable connector 2 Screw terminals to suite 2.
Triguard SC300E TAI16AEA 16-Channel A/I Termination Module Model Transient suppression TAI16AEA A transient suppressor device between each field return line and a common 0V bus clamps the field return line voltage (with respect to 0V common) as follows: +37Vdc to +43Vdc @ 1mA (maximum for continuous overload) +70Vdc @ 69A maximum peak pulse current for 8ms to 20ms Safety ground terminal TS1 M3 threaded bush provision for a ring terminal.
Triguard SC300E 4 TAI16AEA October 2005 – Issue 6
Triguard SC300E TAI16AEA 16-Channel A/I Termination Module TECHNICAL DESCRIPTION PHYSICAL The TAI16AEA comprises a PCB assembly mounted in a moulded carrier that can be snapped onto all commercially available styles of DIN mounting rail. Connection to the chassis backplane is via a multicore cable terminated at either end by a DIN41612 connector.
Triguard SC300E Figure 2-2 Leading dimensions and mounting detail 6 TAI16AEA October 2005 – Issue 6
Triguard SC300E TAI16AEA 16-Channel A/I Termination Module EXTERNAL CONNECTIONS Fixed Terminal Details Chassis connector J1 Connector, 34-way, DIN41612, female Field terminals 1-16(+) and 1-16(-) Screw terminal to suite 2.52mm wire Ground terminal TS1 Provision for M3 ring terminal Signal ground terminal TS2 Provision for field circuit ground via M3 ring terminal (see note in Section 2.2.
Triguard SC300E THEORY OF OPERATION The analogue input termination card provides a convenient and safe means of connecting up to 16 field input channels to an analogue input module in the SC300E chassis. As shown in Figure 2-3 each channel (a pair of lines) is connected via a 63mA fuse to the analogue input module, which may be configured for either voltage or current monitoring inputs. Power for the field loop circuits is supplied from an independent external source.
Triguard SC300E TAI16AEA 16-Channel A/I Termination Module Analogue input channel connections The analogue input channel wiring connections for connector J1 and the screw terminals are listed in Table 2-1. Pin J1-1a is connected to TS2 to provide a signal ground connection Table 2-1.
Triguard SC300E SERVICING SCOPE Servicing operations will not normally extend beyond the replacement of blown fuses. CAUTION Before replacing a blown fuse, ascertain the cause of failure, and take the appropriate remedial action.
Triguard SC300E TAI16AEA 16-Channel A/I Termination Module SERVICE SUPPORT SPARE PARTS pare parts and technical advice can be obtained from the your local area office. LIST OF SPARES Circuit Ref. F1 to F16 Part No.
