Technology modules
D300529 0115 - BL67 I/O modules12-24
Table 12-3:
Technical data
BL67-1RS485/422
Designation BL67-1RS485/422
Number of RS485/422 interfaces 1
Nominal voltage from supply terminal 18 to 30 VDC
Nominal current from supply terminal (field) I
L
25 mA
Voltage from module bus 4.75 to 5.25 VDC
Nominal current consumption from 5 VDC (mod-
ule bus) I
MB
60 mA
Transmission channels RxD, TxD
Data buffer
Receive buffer 128 byte
Transmit buffer 64 byte
RS422 connection type Two wire simplex
or
four wire full-duplex
RS485 connection type Two wire half-duplex
Bit transmission rate max. 115200 Bit/s (parameterizable)
Transmission level active (U
RS1
)min. 500 mV
Transmission level inactive (U
RS0
) max. 200 mV
Common mode (U
GL
)-7 to 12 V
RS485/422 cable length max. 30 m
Cable impedance 120 Ω
Bus terminating resistors 120 Ω (external)
Isolation voltage
U
TMB
(module bus/field voltage/RS485) max. 1000 VDC
U
field
(field voltage/RS485) 0 V
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