2-Series Integrated AV Control System
Crestron
MP2 & MP2E
Connectors, Controls & Indicators (Continued)
#
CONNECTORS
1
,
CONTROLS & INDICATORS
DESCRIPTION
19
COMPUTER
14
COMPUTER
(1) DB9 female, RS-232 computer console port.
Connector is used when programming with a PC. The port is
modem compatible (modem and PC cables not included). Supports
baud rate of up to 115 kB. Use with a standard DB9 straight through
cable.
Pins 1, 4, 6 and 9 are not used but may be connected
.
PIN #
ABBREVIATION
DESCRIPTION
2 TXD
Transmit
Data
3
RXD
Receive Data
5 SG
Signal
Ground
7
CTS
Clear To Send
8
RTS
Request To Send
20
24 VDC
9
(1) 2 mm barrel DC power jack, 24 Volt DC power input;
(PW-2410RU power included);
Passes through to NET port to power Cresnet devices.
24VDC
2.0A
1. Interface connectors for NET, Infrared-Serial, I/O and Relay Output ports are provided with the unit.
2. This LED was labeled “ERR” on units manufactured prior to 2005. It is functionally the same; only the labeling has changed.
3. MP2E
only.
4. The pinout of each 9-pin port is non-standard; it contains RS-422 pins in addition to RS-232. This may result in a conflict with some equipment
and therefore all nine pins should
not
be used. Only the required pins for each communication type should be connected. For RS-232 and –422,
pins 2, 3, 5, 7 and 8 are wired straight through.
5. Data Set Ready (DSR) and Data Terminal Ready (DTR) are not supported.
6. To support RS-485, tie pin 1 (RXD-) to pin 9 (TXD-)
and pin 4 (TXD+) to pin 6 (RXD+) in the cable.
COM (DB9) CONNECTOR
RS-485 BUS
(Refer to table at right.)
Tie Pins 1 & 9
-
Tie Pins 4 & 6
+
Pin 5
G
7. The Cresnet Poll Accelerator effectively increases the network speed, fan-out and device addresses by a factor of 8 for each Poll Accelerator added
to the system.
8. To determine which is pin 1 on the cable, hold the cable so that the end of the eight pin modular jack is facing away from you, with the clip down
and copper side up. Pin 1 is on the far left.
9. Use care in wiring installations to avoid applying 24 VDC to Cresnet wiring from an AC power pack as well as from a system device that contains
its own power supply. Although this condition should not cause any damage, Crestron does not recommend it. In those network configurations that
require more power than can be supplied by the primary power supply alone, disconnect the +24 VDC Cresnet wire from those devices that will be
powered by an AC power pack.
10. Transmission levels on the infrared–serial output connectors are in the 0 to +5 VDC range, which may not be compatible with all RS-232 devices.
11. When configured for one-way RS-232 serial data, you cannot stack multiple RS-232 devices or combine/mix with IR devices on the same port.
12. Digital outputs are TTL values and may not work with devices requiring a “dry” contact closure (e.g. low voltage motor controllers).
13. Ports can be in or out but not both. For additional information, refer to the SIMPL Windows help file.
14. DTR (pin 4) and DSR (pin 6) are not normally used.
12
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2-Series Integrated AV Control System: MP2 & MP2E
Operations Guide – DOC. 6175A
