16-Channel Digital Output Termination Card Introduced Power 24Vdc

Transcription

1 TDO16AIN 16-Channel Digital Output Termination Card Introduced Power 24Vdc (TDO16AIN) Issue 6 October 2005 INTRODUCTION PURPOSE The TDO16AIN 16-channel digital output termination card acts as an interface between the digital output circuits of an SC300E chassis and the field devices which they control. It provides: Screw terminals for the field wiring Power supply inputs for the field devices Fuse protection for the field loops with local and remote indication of fuse failure Overvoltage protection Dummy loads for unused digital output channels to prevent spurious operation of latent fault detection circuits in the associated digital output module. (Dummy loads are only to be connected to outputs which are not used). This document is intended to provide a general understanding of the function of the TDO16AIN, sufficient to enable basic maintenance operations to be effected in the field. ASSOCIATED DOCUMENTATION Reference Title MDO32BNS 32-Channel Digital Output Module User Manual PDD24 Power Distribution Panel User Manual MDO64BNS 64-Channel Digital Output Module User Manual

2 SPECIFICATION Model TDO16AIN Power supply inputs No. of digital input channels 16 Has four separate connectors (FS1, FS2, FS3 and FS4) for dc power supplies. The four positive supplies feed individual sections of the digital outputs via common buses. The buses are linked together. For lightly loaded applications (e.g. 6A) all the required power can be supplied via one connector. For highly loaded applications (e.g. 16A) use multiple power connectors. Nominal field supply voltage Maximum field supply voltage Maximum field supply current Fuse in each positive line to field Chassis cable connector Field cable connector Fuse blown indication Safety ground terminal TS1 Instrument 0V terminal TS2 Overall size (mm) Overall size (inches) Weight 24Vdc 33Vdc 9A for each of the four input connectors (do not exceed 16A total) 1A, fast acting, indicating 34 way DIN41612 Screw terminal to suit 2.5mm 2 wire (16 AWG) Local: Fuse blown LED (one per card) Remote: Fuse blown alarm output (PL1) can be connected to Fuse blown LED on Power Distribution Panel (PDD24). M3 threaded bush provision for a ring terminal. Allows the common 0V supply bus to be grounded via a 10k ohm resistor. Prevents the channels from floating if the card is disconnected from the chassis. M3 threaded bush provision for a ring terminal. Allows the field 0V to be commoned for transient suppression protection. 162L x 125W x 107H 6.4L x 4.9W x 4.2H 0.37kg 2 TDO16AIN October 2005 Issue 6

3 TDO16AIN 16-Channel D/O Termination Card 24Vdc ENVIRONMENTAL SPECIFICATIONS The maximum ambient temperature measured at the hottest point within the Triguard system shall not be greater than 60 degrees centigrade. Temperature operating: +5 C to +60 C Temperature storage: -25 C to +70 C Humidity: 5% to 95% non-condensing at ambient < 40 C EMC/RFI Immunity: Tested and certified to IEC 1131-Part Vibration/Shock: Tested and certified to IEC 1131-Part Certification: General Certification: Ref. SC300E TMR Product Guide (ref ). TRANSPORT AND HANDLING The termination card must be transported and stored in its original packing material which should be retained for this purpose. TDO16AIN October 2005 Issue 6 3

4 TECHNICAL DESCRIPTION PHYSICAL The TDO16AIN comprises a PCB assembly mounted in a moulded carrier that can be snapped onto all commercially available styles of DIN EN mounting rail. Connection to the chassis backplane is via a multicore cable terminated at either end by a DIN41612 connector. Figure 2-2 shows the TDO16AIN with the DIN41612 connector attached and mounted on rail EN type NS 35/5. Figure 2-1 General view and component layout 4 TDO16AIN October 2005 Issue 6

5 TDO16AIN 16-Channel D/O Termination Card 24Vdc Figure 2-2 Leading dimensions and mounting schematic TDO16AIN October 2005 Issue 6 5

6 Figure 2-3 Power distribution system EXTERNAL CONNECTIONS Fixed terminal Field terminals 1 to 16 (+) Chassis connector J1 Field power supply inputs FS1 to FS4 Alarm output PL1 Ground terminal TS1 Table 2-1. Details Screw terminal to suit 2.5mm 2 wire Connector, 34-way, DIN41612, female Header, 2-way, Molex Minifit Jr Header, 2-way, Molex KK Provision for M3 ring terminal 6 TDO16AIN October 2005 Issue 6

7 TDO16AIN 16-Channel D/O Termination Card 24Vdc THEORY OF OPERATION Figure 2-4 shows a circuit diagram of a typical digital output channel. Power supplies for the termination cards are normally provided by a Power Distribution Panel PDD24. Power for the digital output channels is distributed as shown in Figure 2-3. Soldered links LK1 to LK4 are normally present, and in low load applications, external power can be connected to any one of the four inputs FS1 to FS4. For high load applications, or where the channel groups require different supply voltages, cut the links and supply FS1 to FS4 individually. Each digital output channel is powered from a common +ve bus. An indicating fuse is fitted in the digital output signal line to the field device. The fuse failed output from each fuse is connected to a common alarm bus. If any fuse fails, local indication is provided by the illumination of the Fuse blown LED LD1. A signal to operate a remote alarm is available at Alarm output PL1. The -ve bus may be grounded via TS1 if required, preventing the power supplies from floating when the chassis cable is disconnected. TDO16AIN October 2005 Issue 6 7

8 Figure 2-4 Circuit diagram showing a single channel NOTE Current for alarm indication is taken from the chassis module digital output signal. An alarm will be signalled only when the fuse has failed and this output is high. Power distribution panel PDD24 has a Fuse blown alarm indicator with provision for multiple inputs. This facility can be wired to provide fuse blown indication for an entire cabinet. 8 TDO16AIN October 2005 Issue 6

9 TDO16AIN 16-Channel D/O Termination Card 24Vdc SUPPLEMENTARY INFORMATION Dummy loads Dummy loads are only to be connected to outputs that are not used. Do not connect a dummy load in parallel with a real output. Digital output channel connections Table 2-2 lists the digital output channel wiring connections and associated fuses for connector J1 and the screw terminals. Pin J1-1a is connected to the -ve bus (Figure 2-4 ). J1 pins, other than J1-1a and those listed in Table 2-2, are not connected. Screw Terminal DIN41612 Connector J1 Channel Digital output signal to field device Field loop return from field device Field loop fused ac/dc supply to chassis Digital output signal from chassis Fuse Link position for dummy load 1 1(+) 1(-) J1-2a J1-2c F1 JP1-IN 2 2(+) 2(-) J1-4a J1-4c F2 JP2-IN 3 3(+) 3(-) J1-6a J1-6c F3 JP3-IN 4 4(+) 4(-) J1-8a J1-8c F4 JP4-IN 5 5(+) 5(-) J1-10a J1-10c F5 JP5-IN 6 6(+) 6(-) J1-12a J1-12c F6 JP6-IN 7 7(+) 7(-) J1-14a J1-14c F7 JP7-IN 8 8(+) 8(-) J1-16a J1-16c F8 JP8-IN 9 9(L) 9(-) J1-18a J1-18c F9 JP9-IN 10 10(L) 10(-) J1-20a J1-20c F10 JP10-IN 11 11(L) 11(-) J1-22a J1-22c F11 JP11-IN 12 12(L) 12(-) J1-24a J1-24c F12 JP12-IN 13 13(L) 13(-) J1-26a J1-26c F13 JP13-IN 14 14(+) 14(-) J1-28a J1-28c F14 JP14-IN 15 15(+) 15(-) J1-30a J1-30c F15 JP15-IN 16 16(+) 16(-) J1-32a J1-32c F16 JP16-IN TDO16AIN October 2005 Issue 6 9

10 SERVICING SCOPE The TDO16AIN contains all-passive circuitry that is extremely robust. Servicing operations will therefore 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. CONFIGURATION Links LK1 to LK4 are connected by default (see Figure 2-3 ). If all the links are cut, power supply connectors FS1 to FS4 will feed individual digital output channel groups as follows: Table 3-1. Power supply connectors Link no. Channels FS1 Channels 1 to 4 FS2 Channels 5 to 8 FS3 Channels 9 to 12 FS4 Channels 13 to TDO16AIN October 2005 Issue 6

11 TDO16AIN 16-Channel D/O Termination Card 24Vdc SERVICE SUPPORT SPARE PARTS Spare parts and technical advice can be obtained from your local area offices. LIST OF SPARES Circuit Ref Part No Details F1 to F A Indicating fuse TDO16AIN October 2005 Issue 6 11