Electro-Voice 1252, 250 - page 124

 Electro Industries/GaugeTech Doc # E107706 V1.259-12
9.7.2:
Communication
QMaximum registers per request, read or write, is 4 registers.orm
QThe device will operate with the following Default Parameters:
Address 247 (F7H)
Baud Rate 57600 Baud
Transmit Delay Time 20 csec
QSome situations will cause the device to operate with the above Default Parameters. See section
9.4.1 for details of Default Mode.
9.7.3:
Normal Mode
QNormal Mode consists of one process:
1. The device accepts new commands to control the relays.