Honeywell DCP 50 Product Manual page 20

2.3.9 AC SSR Outputs
These outputs provide up to 1A AC drive with a longer lifetime than an
electromechanical relay. For further details, refer to Appendix A.
2.3.10 DC Outputs
See Appendix A.
2.3.11 RS485 Serial Communications Link
The cable used should be suitable for data transfer at the selected rate (1200, 2400,
4800 or 9600 Baud) over the required distance. Transmitters/receivers conform to the
recommendations in the EIA Standard RS485.
The "A" terminal (Terminal 11) on the Controller should be connected to the "A"
terminal on the master device; the "B" terminal (Terminal 12) on the Controller should
be connected to the "B" terminal on the master device. Where several Controllers
are connected to one master port, the master port transceiver in the active state
should be capable of driving a load of 12k
transceiver in the passive state must have pull-up/pull-down resistors of sufficiently low
impedance to ensure that it remains in the quiescent state whilst supplying up to
±100
A each to the Controller transceivers in the high impedance state.
µ
NOTE: The RS485 Serial Communications option and the Remote
Run/Hold option are mutually exclusive.
2-6
per Controller; the master port
Ω