BA201
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Hazardous area Safe area Communications isolator Additional text displays Interface for BEKA intrinsically safe Serial Text Displays BA484D or BA488C Serial Text Display BA201 The BA201 communications isolator is a dedicated interface for connecting intrinsically safe BEKA Serial Text Displays to a safe area computer system. The isolator provides intrinsically safe galvanic isolation between the safe and hazardous areas, plus conversion of the RS232 or RS485 safe area serial data to the dedicated communications signalling required by BEKA Serial Text Displays. The isolator also powers the Serial Text Displays and depending upon the wiring configuration, up to four displays may be connected to each BA201. To prevent earth loops both communications ports are functionally isolated from the BA201 power supply terminals allowing an earthed or floating supply to be used. No configuration is required it is only necessary to connect to the required RS232 or RS485 safe area port, the isolator will automatically function at any of the serial text display communication rates between 300 and 19.2k baud. The RS485 driver turn-around is automatic and optimised for the baud rate in use. Four green LEDs on the top of the isolator indicate status. One LED shows that the device is powered; the others indicate when the RS232 port is being used and when the isolator is transmitting to, or receiving from the serial text display. The enclosure, which is moulded in ABS and polycarbonate, is DIN rail mounting and only 22.6mm wide making it compatible with many proprietary galvanic isolators and Zener barriers. To simplify installation and commissioning the terminals are colour coded and removable. ATEX associated apparatus certification permits the BA201 isolator, when mounted in a safe area, to power and communicate with up to four BEKA intrinsically safe serial t e x t d i s p l a y s mounted in a hazardous area. Either BA484D field mounting o r B A 4 8 8 C p a n e l mounting models text displays may be used, or a mixture of both models may be connected to one BA201 communications isolator. FM, cFM and IECEx approvals allow the BA201 communication isolator to be installed in the USA and Canada. International IECEx approval is already accepted in Australia, New Zealand and Singapore without the need for local certification. In countries that still require local intrinsic safety certification, this can often be quickly obtained based on the international IECEx test report and approval. communicates with BA484D & BA488C serial text displays. area port. IECEx certification. u IN rail mounting D u 3 year guarantee www.beka.co.uk/ba201 BEKA associates Ltd. Old Charlton Rd. Hitchin, Hertfordshire, SG5 2DA, U.K. Tel. (01462) 438301 Fax (01462) 453971 e-mail sales@beka.co.uk www.beka.co.uk

Power supply Voltage 20 - 35V dc Current 100mA typical at 24V powering two Text Displays in a three wire system. Safe area communication Port RS232 or RS485 Unused port should not be connected. intrinsic safety Terminal 1 wrt Terminal 3 parameters Uo 21.2V = Io = 96mA Po 0.51W = Terminal 2 wrt Terminal 3 Uo 13.7V = Io = 84mA Po 0.45W = USA FM Standard 3610 Entity Code Circuit CLI, II, III; Div 1; IS GP A, B, C, D, E, & G. File 3029711 Canada cFM Standard CSA 22.2 No 157 Code Circuit CLI, II, III; Div 1; IS GP A, B, C, D, E, & G. File 3029711C International IECEx Standard Code Cert. No....