Connection Specifications; A/B Signal Output Type - Magnescale Laserscale BL57-RE Anleitung

6-2. Connection Specifications

6-2-1. A/B Signal Output Type

The line driver used by Magnescale Co., Ltd. is compliant with EIA-422.
Also, based on the EIA-422 standards, the common mode voltage between the line driver and line receiver
±
is stipulated as 12 V.
(Using the scale when the common mode voltage of
To prevent problems between the control devices connected to this Magnescale Co., Ltd. product, it is
recommended that you connect (shared connection) the signal ground (power supply ground) and set the
load resistance to 120 Ω. Twisted pair cables (1 turn/1 inch min.) with a core thickness of at least AWG28 are
recommended for the differential signal cables.
(It is even better if the characteristic differential impedance is the same as the load resistance value.)
Send side
Send side
Power supply ground
(Signal ground)
Line driver side
DS34C87
Receiving power supplied from the controller
Scale
Power supply
ground
BL57-RE
±
Fig. 6-3
Power supply (5 V)
FG
Fig. 6-4
12 V is exceeded can damage the scale.)
Receive side
Ω
Load 120
Receive side
Power supply ground
(Signal ground)
Line receiver side (example)
DS34C86
MC26C32
MC34C86
Power supply (5 V)
Power supply
ground
FG
Controller
6-3
(E)