CTEK Z1204 User Manual

TN0019 – Z1216 I/O and Z1204 Relay Module

Hardware Configuration

TN0019 - 28 March, 2011

Note: This TechNote is obsolete but continues to be available for users still

deploying the generation of I/O modules described herein. See the
TechNote Index for updates on I/O modules

Purpose:

This TechNote describes the hardware configuration of the Z1204S/U Relay module and the Z1216S/U
I/O Sensor and Control Module. These modules are components of Ctek's Automation Framework. The
Z1204S and Z1216S rely on two-wire RS485 communications and an external power source. The
Z1204U and Z1216U use USB communications for both control and power. These modules can be
managed from a Ctek SkyRouter by Ctek's Automation Control application or by a custom application.

Figure 1 shows an RS485 network connected to a SkyRouter. Ctek's I/O modules can be mixed and
matched with other Ctek or non-Ctek RS485 devices on a network. Each device must have an unique
address in the range of 01 - 255 decimal or 01 - FF hexadecimal.

Note - RS485 device address 00 is reserved for Ctek's PowerMinder and should not be used for other

devices.

A single USB I/O or relay controller can be directly connected and managed by a Ctek SkyRouter. Figure
2 depicts a USB I/O connection to a single USB controller. In addition, a USB network can be
constructed with a customer supplied USB hub as shown in Figure 3. Ctek also offers an isolated USB to
RS485 converter (Figure 4) that can be used to construct a network of up to 31 I/O modules. The isolated
converter provides 2.5KV of isolation between the network and the SkyRouter. USB I/O devices are
addressed by an 8-byte address pre-programmed at the factory. USB and RS485 devices can coexist on a
single SkyRouter.

Important Note - RS485 modules are addressed with on-board jumper plugs. USB modules come pre-

addressed from the factory. RS485 modules also require an external power supply for components and
importantly for a sensor reference voltage. USB modules obtain component power and reference voltage
from the power supplied by the USB connection. Pages 2 - 7 of this document are specific to RS485
modules. The remainder of the document is applicable to bothRS485 and USB modules.

1

TN0019 – Z1216 I/O and Z1204 Relay Module

Hardware Configuration

TN0019 - 28 March, 2011

Figure 1

Figure 2 - Single USB Controller

2

TN0019 – Z1216 I/O and Z1204 Relay Module

Hardware Configuration

TN0019 - 28 March, 2011

Figure 3 - USB Hub Network

3

TN0019 – Z1216 I/O and Z1204 Relay Module

Hardware Configuration

TN0019 - 28 March, 2011

Figure 4 - Isolated USB to RS485 Converter

4